metainfo.py 60.4 KB
Newer Older
1
2
3
4
5
6
7
8
9
10
11
12
13
# Copyright 2018 Markus Scheidgen
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an"AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
14

15
16
17
18
"""
The NOMAD meta-info allows to define physics data quantities. These definitions are
necessary for all computer representations of respective data (e.g. in Python,
search engines, data-bases, and files).
19

20
This modules provides various Python interfaces for
21

22
23
24
- defining meta-info data
- to create and manipulate data that follows these definitions
- to (de-)serialize meta-info data in JSON (i.e. represent data in JSON formatted files)
25

26
27
28
29
Here is a simple example that demonstrates the definition of System related quantities:

.. code-block:: python

Markus Scheidgen's avatar
Markus Scheidgen committed
30
    class System(MSection):
31
32
33
34
35
        \"\"\"
        A system section includes all quantities that describe a single a simulated
        system (a.k.a. geometry).
        \"\"\"

36
37
38
39
        n_atoms = Quantity(
            type=int, description='''
            A Defines the number of atoms in the system.
            ''')
40

41
42
43
44
        atom_labels = Quantity(type=Enum(ase.data.chemical_symbols), shape['n_atoms'])
        atom_positions = Quantity(type=float, shape=['n_atoms', 3], unit=Units.m)
        simulation_cell = Quantity(type=float, shape=[3, 3], unit=Units.m)
        pbc = Quantity(type=bool, shape=[3])
45

46
47
48
    class Run(MSection):
        systems = SubSection(sub_section=System, repeats=True)

49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
Here, we define a `section` called ``System``. The section mechanism allows to organize
related data into, well, sections. Sections form containment hierarchies. Here
containment is a parent-child (whole-part) relationship. In this example many ``Systems``,
are part of one ``Run``. Each ``System`` can contain values for the defined quantities:
``n_atoms``, ``atom_labels``, ``atom_positions``, ``simulation_cell``, and ``pbc``.
Quantities allow to state type, shape, and physics unit to specify possible quantity
values.

Here is an example, were we use the above definition to create, read, and manipulate
data that follows these definitions:

.. code-bock:: python

    run = Run()
    system = run.m_create(System)
    system.n_atoms = 3
    system.atom_labels = ['H', 'H', 'O']

    print(system.atom_labels)
    print(run.m_to_json(ident=2))

This last statement, will produce the following JSON:

.. code-block:: JSON

    {
75
        "m_def" = "Run",
76
77
        "System": [
            {
78
                "m_def" = "System",
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
                "m_parent_index" = 0,
                "n_atoms" = 3,
                "atom_labels" = [
                    "H",
                    "H",
                    "O"
                ]
            }
        ]
    }

This is the JSON representation, a serialized version of the Python representation in
the example above.

Sections can be extended with new quantities outside the original section definition.
This provides the key mechanism to extend commonly defined parts with (code) specific
quantities:

.. code-block:: Python

    class Method(nomad.metainfo.common.Method):
        x_vasp_incar_ALGO=Quantity(
            type=Enum(['Normal', 'VeryFast', ...]),
            links=['https://cms.mpi.univie.ac.at/wiki/index.php/ALGO'])
        \"\"\"
        A convenient option to specify the electronic minimisation algorithm (as of VASP.4.5)
        and/or to select the type of GW calculations.
        \"\"\"


All meta-info definitions and classes for meta-info data objects (i.e. section instances)
110
inherit from :class:` MSection`. This base-class provides common functions and properties
111
112
113
114
115
116
for all meta-info data objects. Names of these common parts are prefixed with ``m_``
to distinguish them from user defined quantities. This also constitute's the `reflection`
interface (in addition to Python's build in ``getattr``, ``setattr``) that allows to
create and manipulate meta-info data, without prior program time knowledge of the underlying
definitions.

Markus Scheidgen's avatar
Markus Scheidgen committed
117
.. autoclass:: MSection
118
119
120

The following classes can be used to define and structure meta-info data:

Markus Scheidgen's avatar
Markus Scheidgen committed
121
- sections are defined by sub-classes :class:`MSection` and using :class:`Section` to
122
  populate the classattribute `m_def`
123
124
125
126
127
128
129
130
131
132
133
134
- quantities are defined by assigning classattributes of a section with :class:`Quantity`
  instances
- references (from one section to another) can be defined with quantities that use
  section definitions as type
- dimensions can use defined by simply using quantity names in shapes
- categories (former `abstract type definitions`) can be given in quantity definitions
  to assign quantities to additional specialization-generalization hierarchies

See the reference of classes :class:`Section` and :class:`Quantities` for details.

.. autoclass:: Section
.. autoclass:: Quantity
135
136
"""

Markus Scheidgen's avatar
Markus Scheidgen committed
137
# TODO event mechanism
138
# TODO validation and constraints
139

140
141
from typing import Type, TypeVar, Union, Tuple, Iterable, List, Any, Dict, Set, \
    Callable as TypingCallable, cast
142
from collections.abc import Iterable as IterableABC
143
import sys
144
import inspect
145
import re
146
import json
147
import itertools
148

149
import numpy as np
150
151
from pint.unit import _Unit
from pint import UnitRegistry
152
153
154
import aniso8601
from datetime import datetime
import pytz
155

156
157
158

m_package: 'Package' = None

Markus Scheidgen's avatar
Markus Scheidgen committed
159
160
is_bootstrapping = True
MSectionBound = TypeVar('MSectionBound', bound='MSection')
161
T = TypeVar('T')
162

163

Markus Scheidgen's avatar
Markus Scheidgen committed
164
165
# Metainfo errors

166
class MetainfoError(Exception):
167
    """ Metainfo related errors. """
168
169
170
    pass


171
172
173
174
175
class DeriveError(MetainfoError):
    """ An error occurred while computing a derived value. """
    pass


176
177
178
179
class MetainfoReferenceError(MetainfoError):
    """ An error indicating that a reference could not be resolved. """


Markus Scheidgen's avatar
Markus Scheidgen committed
180
# Metainfo quantity data types
181

182
class Enum(list):
183
    """ Allows to define str types with values limited to a pre-set list of possible values. """
184
185
186
187
188
189
    def __init__(self, *args):
        if len(args) == 1 and isinstance(args[0], list):
            super().__init__(args[0])

        else:
            super().__init__(args)
190
191


192
193
194
195
196
197
198
class MProxy():
    """ A placeholder object that acts as reference to a value that is not yet resolved. """

    def __init__(self, url: str):
        self.url = url


199
200
201
202
class DataType:
    """
    Allows to define custom data types that can be used in the meta-info.

203
    The metainfo supports the most types out of the box. These includes the python build-in
204
205
    primitive types (int, bool, str, float, ...), references to sections, and enums.
    However, in some occasions you need to add custom data types.
206
207
208
209
210

    This base class lets you customize various aspects of value treatment. This includes
    type checks and various value transformations. This allows to store values in the
    section differently from how the usermight set/get them, and it allows to have non
    serializeable values that are transformed on de-/serialization.
211
    """
212
213
214
215
216
217
    def set_normalize(self, section: 'MSection', quantity_def: 'Quantity', value: Any) -> Any:
        """ Transforms the given value before it is set and checks its type. """
        return value

    def get_normalize(self, section: 'MSection', quantity_def: 'Quantity', value: Any) -> Any:
        """ Transforms the given value when it is get. """
218
219
        return value

220
221
    def serialize(self, section: 'MSection', quantity_def: 'Quantity', value: Any) -> Any:
        """ Transforms the given value when making the section serializeable. """
222
223
        return value

224
225
    def deserialize(self, section: 'MSection', quantity_def: 'Quantity', value: Any) -> Any:
        """ Transforms the given value from its serializeable form. """
226
227
228
        return value


229
230
class __Dimension(DataType):
    def set_normalize(self, section, quantity_def: 'Quantity', value):
231
        if isinstance(value, int):
Markus Scheidgen's avatar
Markus Scheidgen committed
232
            return value
233
234
235

        if isinstance(value, str):
            if value.isidentifier():
Markus Scheidgen's avatar
Markus Scheidgen committed
236
                return value
237
            if re.match(r'(\d)\.\.(\d|\*)', value):
Markus Scheidgen's avatar
Markus Scheidgen committed
238
                return value
239
240

        if isinstance(value, Section):
Markus Scheidgen's avatar
Markus Scheidgen committed
241
            return value
242

243
        if isinstance(value, type) and hasattr(value, 'm_def'):
Markus Scheidgen's avatar
Markus Scheidgen committed
244
            return value
245
246
247
248

        raise TypeError('%s is not a valid dimension' % str(value))


249
250
class __Unit(DataType):
    def set_normalize(self, section, quantity_def: 'Quantity', value):
251
252
253
254
255
256
257
258
        if isinstance(value, str):
            value = units.parse_units(value)

        elif not isinstance(value, _Unit):
            raise TypeError('Units must be given as str or pint Unit instances.')

        return value

259
    def serialize(self, section, quantity_def: 'Quantity', value):
260
261
        return value.__str__()

262
    def deserialize(self, section, quantity_def: 'Quantity', value):
263
264
        return units.parse_units(value)

265

Markus Scheidgen's avatar
Markus Scheidgen committed
266
267
268
269
units = UnitRegistry()
""" The default pint unit registry that should be used to give units to quantity definitions. """


270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
class __Callable(DataType):
    def serialize(self, section, quantity_def: 'Quantity', value):
        raise MetainfoError('Callables cannot be serialized')

    def deserialize(self, section, quantity_def: 'Quantity', value):
        raise MetainfoError('Callables cannot be serialized')


class __QuantityType(DataType):
    """ Data type for defining the type of a metainfo quantity.

    A metainfo quantity type can be one of

    - python build-in primitives: int, float, bool, str
    - numpy dtypes, e.g. f, int32
    - a section definition to define references
    - an Enum instance to use it's values as possible str values
    - a custom datatype, i.e. instance of :class:`DataType`
    - Any
    """

    def set_normalize(self, section, quantity_def, value):
        if value in [str, int, float, bool]:
            return value

        if isinstance(value, Enum):
            for enum_value in value:
                if not isinstance(enum_value, str):
                    raise TypeError('Enum value %s is not a string.' % enum_value)
            return value

        if type(value) == np.dtype:
            return value

        if isinstance(value, Section):
            return value

        if isinstance(value, DataType):
            return value

        if value == Any:
            return value

        if isinstance(value, type):
            section = getattr(value, 'm_def', None)
            if section is not None:
                return Reference(section)

        raise MetainfoError(
            'Type %s of %s is not a valid metainfo quantity type' %
            (value, quantity_def))

    def serialize(self, section, quantity_def, value):
        if value in [str, int, float, bool]:
            return dict(type_kind='python', type_data=value.__name__)

        if isinstance(value, Enum):
            return dict(type_kind='Enum', type_data=list(value))

        if type(value) == np.dtype:
            return dict(type_kind='numpy', type_data=str(value))

        if isinstance(value, Reference):
            return dict(type_kind='reference', type_data=value.target_section_def.m_path())

        if isinstance(value, DataType):
            module = value.__class__.__module__
            if module is None or module == str.__class__.__module__:
                type_data = value.__class__.__name__
            else:
                type_data = '%s.%s' % (module, value.__class__.__name__)

            return dict(type_kind='custom', type_data=type_data)

        if value == Any:
            return dict(type_kind='Any')

        raise MetainfoError(
            'Type %s of %s is not a valid metainfo quantity type' %
            (value, quantity_def))


class Reference(DataType):
    """ Datatype used for reference quantities. """

    def __init__(self, section_def: 'Section'):
        if not isinstance(section_def, Section):
            raise MetainfoError('%s is not a section definition.' % section_def)
        self.target_section_def = section_def

    def set_normalize(self, section: 'MSection', quantity_def: 'Quantity', value: Any) -> Any:
        if self.target_section_def.m_follows(Definition.m_def):
            # special case used in metainfo definitions, where we reference metainfo definitions
            # using their Python class. E.g. referencing a section definition using its
            # class instead of the object: Run vs. Run.m_def
            if isinstance(value, type):
                definition = getattr(value, 'm_def', None)
                if definition is not None and definition.m_follows(self.target_section_def):
                    return definition

        if isinstance(value, MProxy):
            return value

        if not isinstance(value, MSection):
            raise TypeError(
                'The value %s is not a section and can not be used as a reference.' % value)

        if not value.m_follows(self.target_section_def):
            raise TypeError(
                '%s is not a %s and therefore an invalid value of %s.' %
                (value, self.target_section_def, quantity_def))

        return value

    def get_normalize(self, section: 'MSection', quantity_def: 'Quantity', value: Any) -> Any:
        if isinstance(value, MProxy):
            resolved: 'MSection' = section.m_resolve(value.url)
            if resolved is None:
                raise ReferenceError('Could not resolve %s from %s.' % (value, section))
            section.m_set(quantity_def, value)
            return resolved

        return value

    def serialize(self, section: 'MSection', quantity_def: 'Quantity', value: Any) -> Any:
        return value.m_path()

    def deserialize(self, section: 'MSection', quantity_def: 'Quantity', value: Any) -> Any:
        return MProxy(value)


401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
class __Datetime(DataType):

    def __parse(self, datetime_str: str) -> datetime:
        try:
            try:
                return aniso8601.parse_datetime(datetime_str)
            except ValueError:
                date = aniso8601.parse_date(datetime_str)
                return datetime(date.year, date.month, date.day)
        except Exception:
            raise TypeError('Invalid date literal "{0}"'.format(datetime_str))

    def set_normalize(self, section: 'MSection', quantity_def: 'Quantity', value: Any) -> Any:
        if isinstance(value, str):
            value = self.__parse(value)

        if not isinstance(value, datetime):
            raise TypeError('%s is not a datetime.' % value)

        return value

    def serialize(self, section: 'MSection', quantity_def: 'Quantity', value: Any) -> Any:
        value.replace(tzinfo=pytz.utc)
        return value.isoformat()

    def deserialize(self, section: 'MSection', quantity_def: 'Quantity', value: Any) -> Any:
        return self.__parse(value)


430
431
432
433
Dimension = __Dimension()
Unit = __Unit()
QuantityType = __QuantityType()
Callable = __Callable()
434
Datetime = __Datetime()
435
436


Markus Scheidgen's avatar
Markus Scheidgen committed
437
438
# Metainfo data storage and reflection interface

439
class MObjectMeta(type):
440

441
442
    def __new__(self, cls_name, bases, dct):
        cls = super().__new__(self, cls_name, bases, dct)
Markus Scheidgen's avatar
Markus Scheidgen committed
443

Markus Scheidgen's avatar
Markus Scheidgen committed
444
445
        init = getattr(cls, '__init_cls__')
        if init is not None and not is_bootstrapping:
446
447
            init()
        return cls
448
449


450
Content = Tuple['MSection', int, 'SubSection', 'MSection']
451
452
453
454
455
456
457
458
459
460
461

SectionDef = Union[str, 'Section', 'SubSection', Type[MSectionBound]]
""" Type for section definition references.

This can either be :

- the name of the section
- the section definition itself
- the definition of a sub section
- or the section definition Python class
"""
462
463


464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
class MData:
    """ An interface for low-level metainfo data objects.

    Metainfo data objects store the data of a single section instance. This interface
    constitutes the minimal functionality for accessing and modifying section data.
    Different implementations of this interface, can realize different storage backends,
    or include different rigorosity of type and shape checks.

    All section instances will implement this interface, usually be delegating calls to
    a standalone implementation of this interface. This allows to configure various
    data backends on section instance creation.
    """

    def __getitem__(self, key):
        raise NotImplementedError()

    def __setitem__(self, key, value):
        raise NotImplementedError()

    def m_set(self, section: 'MSection', quantity_def: 'Quantity', value: Any) -> None:
        """ Set the given value for the given quantity. """
        raise NotImplementedError()

    def m_get(self, section: 'MSection', quantity_def: 'Quantity') -> Any:
        """ Retrieve the given value for the given quantity. """
        raise NotImplementedError()

    def m_is_set(self, section: 'MSection', quantity_def: 'Quantity') -> bool:
        """ True iff this quantity was explicitely set. """
        raise NotImplementedError()

    def m_add_values(
            self, section: 'MSection', quantity_def: 'Quantity', values: Any,
            offset: int) -> None:
        """ Add (partial) values for the given quantity of higher dimensionality. """
        raise NotImplementedError()

    def m_add_sub_section(
            self, section: 'MSection', sub_section_def: 'SubSection',
            sub_section: 'MSection') -> None:
        """ Adds the given section instance as a sub section of the given sub section definition. """
        raise NotImplementedError()

    def m_get_sub_section(
            self, section: 'MSection', sub_section_def: 'SubSection',
            index: int) -> 'MSection':
        """ Retrieves a single sub section of the given sub section definition. """
        raise NotImplementedError()

    def m_get_sub_sections(
            self, section: 'MSection', sub_section_def: 'SubSection') -> Iterable['MSection']:
        """ Retrieves  all sub sections of the given sub section definition. """
        raise NotImplementedError()

    def m_sub_section_count(self, section: 'MSection', sub_section_def: 'SubSection') -> int:
        """ Returns the number of sub sections for the given sub section definition. """
        raise NotImplementedError()


class MDataDict(MData):
    """ A simple dict backed implementaton of :class:`MData`. """

    def __init__(self, dct: Dict[str, Any] = None):
        if dct is None:
            dct = {}

        self.dct = dct

    def __getitem__(self, key):
        return self.dct[key]

    def __setitem__(self, key, value):
        self.dct[key] = value

    def m_set(self, section: 'MSection', quantity_def: 'Quantity', value: Any) -> None:
        self.dct[quantity_def.name] = value

    def m_get(self, section: 'MSection', quantity_def: 'Quantity') -> Any:
        quantity_name = quantity_def.name
        if quantity_name not in self.dct:
            return quantity_def.default
        else:
            return self.dct[quantity_name]

    def m_is_set(self, section: 'MSection', quantity_def: 'Quantity') -> bool:
        return quantity_def.name in self.dct

    def m_add_values(
            self, section: 'MSection', quantity_def: 'Quantity', values: Any,
            offset: int) -> None:

        # TODO
        raise NotImplementedError()

    def m_add_sub_section(
            self, section: 'MSection', sub_section_def: 'SubSection',
            sub_section: 'MSection') -> None:

        sub_section_name = sub_section_def.name
        if sub_section_def.repeats:
            sub_section_lst = self.dct.get(sub_section_name, None)
            if sub_section_lst is None:
                sub_section_lst = self.dct.setdefault(sub_section_name, [])

            sub_section_lst.append(sub_section)

        else:
            self.dct[sub_section_name] = sub_section

    def m_get_sub_section(
            self, section: 'MSection', sub_section_def: 'SubSection',
            index: int) -> 'MSection':

        if sub_section_def.repeats:
            return self.dct[sub_section_def.name][index]

        else:
            return self.dct.get(sub_section_def.name, None)

    def m_get_sub_sections(
            self, section: 'MSection', sub_section_def: 'SubSection') -> Iterable['MSection']:
        return self.dct.get(sub_section_def.name, [])

    def m_sub_section_count(self, section: 'MSection', sub_section_def: 'SubSection') -> int:
        sub_section_name = sub_section_def.name
        if sub_section_name not in self.dct:
            return 0

        if not sub_section_def.repeats:
            return 1

        return len(self.dct[sub_section_name])


Markus Scheidgen's avatar
Markus Scheidgen committed
598
599
class MSection(metaclass=MObjectMeta):
    """Base class for all section instances on all meta-info levels.
600

Markus Scheidgen's avatar
Markus Scheidgen committed
601
602
603
    All metainfo objects instantiate classes that inherit from ``MSection``. Each
    section or quantity definition is an ``MSection``, each actual (meta-)data carrying
    section is an ``MSection``. This class consitutes the reflection interface of the
604
605
606
607
608
609
610
611
612
613
614
615
616
    meta-info, since it allows to manipulate sections (and therefore all meta-info data)
    without having to know the specific sub-class.

    It also carries all the data for each section. All sub-classes only define specific
    sections in terms of possible sub-sections and quantities. The data is managed here.

    The reflection insterface for reading and manipulating quantity values consists of
    Pythons build in ``getattr``, ``setattr``, and ``del``, as well as member functions
    :func:`m_add_value`, and :func:`m_add_values`.

    Sub-sections and parent sections can be read and manipulated with :data:`m_parent`,
    :func:`m_sub_section`, :func:`m_create`.

617
618
619
620
621
    .. code-block:: python

        system = run.m_create(System)
        assert system.m_parent == run
        assert run.m_sub_section(System, system.m_parent_index) == system
622
623

    Attributes:
624
        m_def: The section definition that defines this sections, its possible
625
626
            sub-sections and quantities.
        m_parent: The parent section instance that this section is a sub-section of.
627
        m_parent_sub_section: The sub section definition that holds this section in the parent.
628
629
630
631
632
633
634
635
636
        m_parent_index: For repeatable sections, parent keep a list of sub-sections for
            each section definition. This is the index of this section in the respective
            parent sub-section list.
        m_data: The dictionary that holds all data of this section. It keeps the quantity
            values and sub-section. It should only be read directly (and never manipulated)
            if you are know what you are doing. You should always use the reflection interface
            if possible.
    """

637
    m_def: 'Section' = None
638

639
640
    def __init__(self, m_def: 'Section' = None, m_data: MData = None, **kwargs):

641
        self.m_def: 'Section' = m_def
642
643
        self.m_parent: 'MSection' = None
        self.m_parent_sub_section: 'SubSection' = None
644
        self.m_parent_index = -1
645

646
        # get missing m_def from class
647
        cls = self.__class__
648
649
        if self.m_def is None:
            self.m_def = cls.m_def
650

651
        # check m_def
652
        if cls.m_def is not None:
653
654
655
656
657
658
659
660
661
            if self.m_def != cls.m_def:
                MetainfoError('Section class and section definition must match.')

            if self.m_def.extends_base_section:
                MetainfoError('Section extends another section and cannot be instantiated.')

        else:
            if not is_bootstrapping:
                MetainfoError('Section has not m_def.')
662

663
        # get annotations from kwargs
664
        self.m_annotations: Dict[str, Any] = {}
Markus Scheidgen's avatar
Markus Scheidgen committed
665
        rest = {}
666
667
668
669
        for key, value in kwargs.items():
            if key.startswith('a_'):
                self.m_annotations[key[2:]] = value
            else:
Markus Scheidgen's avatar
Markus Scheidgen committed
670
671
                rest[key] = value

672
673
674
        # initialize data
        self.m_data = m_data
        if self.m_data is None:
675
            self.m_data = MDataDict()
676

677
678
        # set remaining kwargs
        if is_bootstrapping:
679
            self.m_data.dct.update(**rest)  # type: ignore
Markus Scheidgen's avatar
Markus Scheidgen committed
680
        else:
681
            self.m_update(**rest)
682

683
    @classmethod
Markus Scheidgen's avatar
Markus Scheidgen committed
684
    def __init_cls__(cls):
685
686
        # ensure that the m_def is defined
        m_def = cls.m_def
Markus Scheidgen's avatar
Markus Scheidgen committed
687
        if m_def is None:
688
689
            m_def = Section()
            setattr(cls, 'm_def', m_def)
690

691
692
        # transfer name and description to m_def
        m_def.name = cls.__name__
693
        if cls.__doc__ is not None:
694
            m_def.description = inspect.cleandoc(cls.__doc__).strip()
695
        m_def.section_cls = cls
696

697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
        # add base sections
        if m_def.extends_base_section:
            base_sections_count = len(cls.__bases__)
            if base_sections_count == 0:
                raise MetainfoError(
                    'Section %s extend the base section, but has no base section.' % m_def)

            elif base_sections_count > 1:
                raise MetainfoError(
                    'Section %s extend the base section, but has more than one base section' % m_def)

            base_section_cls = cls.__bases__[0]
            base_section = getattr(base_section_cls, 'm_def', None)
            if base_section is None:
                raise MetainfoError(
                    'The base section of %s is not a section class.' % m_def)

            for name, attr in cls.__dict__.items():
                if isinstance(attr, Property):
                    setattr(base_section_cls, name, attr)

            section_to_add_properties_to = base_section
        else:
            for base_cls in cls.__bases__:
                if base_cls != MSection:
                    base_section = getattr(base_cls, 'm_def')
                    if base_section is None:
                        raise TypeError(
                            'Section defining classes must have MSection or a decendant as '
                            'base classes.')

                    base_sections = list(m_def.m_get(Section.base_sections))
                    base_sections.append(base_section)
                    m_def.m_set(Section.base_sections, base_sections)

            section_to_add_properties_to = m_def

734
        for name, attr in cls.__dict__.items():
735
736
            # transfer names and descriptions for properties
            if isinstance(attr, Property):
737
                attr.name = name
738
                if attr.description is not None:
739
                    attr.description = inspect.cleandoc(attr.description).strip()
740
                    attr.__doc__ = attr.description
741

742
                if isinstance(attr, Quantity):
743
                    section_to_add_properties_to.m_add_sub_section(Section.quantities, attr)
744
                elif isinstance(attr, SubSection):
745
                    section_to_add_properties_to.m_add_sub_section(Section.sub_sections, attr)
746
747
                else:
                    raise NotImplementedError('Unknown property kind.')
748

749
750
751
        # add section cls' section to the module's package
        module_name = cls.__module__
        pkg = Package.from_module(module_name)
752
        pkg.m_add_sub_section(Package.section_definitions, cls.m_def)
753

754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
    def __check_np(self, quantity_ref: 'Quantity', value: np.ndarray) -> np.ndarray:
        # TODO
        return value

    def __set_normalize(self, quantity_def: 'Quantity', value: Any) -> Any:

        if isinstance(quantity_def.type, DataType):
            return quantity_def.type.set_normalize(self, quantity_def, value)

        elif isinstance(quantity_def.type, Section):
            if isinstance(value, MProxy):
                return value

            if not isinstance(value, MSection):
                raise TypeError(
                    'The value %s for reference quantity %s is not a section instance.' %
                    (value, quantity_def))

            if not value.m_follows(quantity_def.type):
                raise TypeError(
                    'The value %s for quantity %s does not follow %s' %
                    (value, quantity_def, quantity_def.type))

        elif isinstance(quantity_def.type, Enum):
            if value not in quantity_def.type:
                raise TypeError(
                    'The value %s is not an enum value for quantity %s.' %
                    (value, quantity_def))

        elif quantity_def.type == Any:
            pass

        else:
            if type(value) != quantity_def.type:
                raise TypeError(
                    'The value %s with type %s for quantity %s is not of type %s' %
                    (value, type(value), quantity_def, quantity_def.type))

        return value

794
795
796
797
    def __resolve_synonym(self, quantity_def: 'Quantity') -> 'Quantity':
        if quantity_def.synonym_for is not None:
            return self.m_def.all_quantities[quantity_def.synonym_for]
        return quantity_def
798

799
800
801
    def m_set(self, quantity_def: 'Quantity', value: Any) -> None:
        """ Set the given value for the given quantity. """
        quantity_def = self.__resolve_synonym(quantity_def)
802

803
804
        if quantity_def.derived is not None:
            raise MetainfoError('The quantity %s is derived and cannot be set.' % quantity_def)
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834

        if type(quantity_def.type) == np.dtype:
            if type(value) != np.ndarray:
                try:
                    value = np.asarray(value)
                except TypeError:
                    raise TypeError(
                        'Could not convert value %s of %s to a numpy array' %
                        (value, quantity_def))

            value = self.__check_np(quantity_def, value)

        else:
            dimensions = len(quantity_def.shape)
            if dimensions == 0:
                value = self.__set_normalize(quantity_def, value)

            elif dimensions == 1:
                if type(value) == str or not isinstance(value, IterableABC):
                    raise TypeError(
                        'The shape of %s requires an iterable value, but %s is not iterable.' %
                        (quantity_def, value))

                value = list(self.__set_normalize(quantity_def, item) for item in value)

            else:
                raise MetainfoError(
                    'Only numpy arrays and dtypes can be used for higher dimensional '
                    'quantities.')

835
        self.m_data.m_set(self, quantity_def, value)
836

837
838
839
    def m_get(self, quantity_def: 'Quantity') -> Any:
        """ Retrieve the given value for the given quantity. """
        quantity_def = self.__resolve_synonym(quantity_def)
840
841
842
843
844
845
        if quantity_def.derived is not None:
            try:
                return quantity_def.derived(self)
            except Exception as e:
                raise DeriveError('Could not derive value for %s: %s' % (quantity_def, str(e)))

846
847
        value = self.m_data.m_get(self, quantity_def)

848
849
850
851
852
853
854
855
856
857
858
859
860
861
        if isinstance(quantity_def.type, DataType) and quantity_def.type.get_normalize != DataType.get_normalize:
            dimensions = len(quantity_def.shape)
            if dimensions == 0:
                value = quantity_def.type.get_normalize(self, quantity_def, value)

            elif dimensions == 1:
                value = list(
                    quantity_def.type.get_normalize(self, quantity_def, item)
                    for item in value)

            else:
                raise MetainfoError(
                    'Only numpy arrays and dtypes can be used for higher dimensional '
                    'quantities.')
862
863

        return value
864

865
866
    def m_is_set(self, quantity_def: 'Quantity') -> bool:
        quantity_def = self.__resolve_synonym(quantity_def)
867
868
869
        if quantity_def.derived is not None:
            return True

870
        return self.m_data.m_is_set(self, quantity_def)
Markus Scheidgen's avatar
Markus Scheidgen committed
871

872
873
874
    def m_add_values(self, quantity_def: 'Quantity', values: Any, offset: int) -> None:
        """ Add (partial) values for the given quantity of higher dimensionality. """
        self.m_data.m_add_values(self, quantity_def, values, offset)
875

876
877
    def m_add_sub_section(self, sub_section_def: 'SubSection', sub_section: 'MSection') -> None:
        """ Adds the given section instance as a sub section of the given sub section definition. """
Markus Scheidgen's avatar
Markus Scheidgen committed
878

879
        parent_index = -1
880
        if sub_section_def.repeats:
881
882
883
884
            parent_index = self.m_sub_section_count(sub_section_def)
        sub_section.m_parent = self
        sub_section.m_parent_sub_section = sub_section_def
        sub_section.m_parent_index = parent_index
885

886
        self.m_data.m_add_sub_section(self, sub_section_def, sub_section)
887

888
889
890
    def m_get_sub_section(self, sub_section_def: 'SubSection', index: int) -> 'MSection':
        """ Retrieves a single sub section of the given sub section definition. """
        return self.m_data.m_get_sub_section(self, sub_section_def, index)
891

892
893
894
    def m_get_sub_sections(self, sub_section_def: 'SubSection') -> Iterable['MSection']:
        """ Retrieves  all sub sections of the given sub section definition. """
        return self.m_data.m_get_sub_sections(self, sub_section_def)
895

896
897
898
    def m_sub_section_count(self, sub_section_def: 'SubSection') -> int:
        """ Returns the number of sub sections for the given sub section definition. """
        return self.m_data.m_sub_section_count(self, sub_section_def)
899

900
901
902
    def m_create(self, section_cls: Type[MSectionBound], **kwargs) -> MSectionBound:
        """ Creates a section instance and adds it to this section provided there is a
        corresponding sub section.
903
        """
904

905
906
907
        section_def = section_cls.m_def
        sub_section_def = self.m_def.all_sub_sections_by_section.get(section_def, None)
        if sub_section_def is None:
908
            raise TypeError('There is no sub section to hold a %s in %s.' % (section_def, self.m_def))
909

910
911
        sub_section = section_cls(**kwargs)
        self.m_add_sub_section(sub_section_def, sub_section)
912

913
        return cast(MSectionBound, sub_section)
914

915
    def m_update(self, safe: bool = True, **kwargs):
916
        """ Updates all quantities and sub-sections with the given arguments. """
917
918
919
920
921
922
923
924
925
926
927
928
929
        if safe:
            for name, value in kwargs.items():
                prop = self.m_def.all_properties.get(name, None)
                if prop is None:
                    raise KeyError('%s is not an attribute of this section %s' % (name, self))

                if isinstance(prop, SubSection):
                    if prop.repeats:
                        if isinstance(value, List):
                            for item in value:
                                self.m_add_sub_section(prop, item)
                        else:
                            raise TypeError('Sub section %s repeats, but no list was given' % prop.name)
930
                    else:
931
932
                        self.m_add_sub_section(prop, item)

933
                else:
934
                    self.m_set(prop, value)
935

936
937
        else:
            self.m_data.m_data.dct.update(**kwargs)  # type: ignore
938

939
940
941
942
    def m_as(self, section_cls: Type[MSectionBound]) -> MSectionBound:
        """ 'Casts' this section to the given extending sections. """
        return cast(MSectionBound, self)

943
    def m_follows(self, definition: 'Section') -> bool:
944
        """ Determines if this section's definition is or is derived from the given definition. """
945
        return self.m_def == definition or definition in self.m_def.all_base_sections
946

947
    def m_to_dict(self, with_meta: bool = False) -> Dict[str, Any]:
948
        """Returns the data of this section as a json serializeable dictionary. """
949
950

        def items() -> Iterable[Tuple[str, Any]]:
951
952
953
954
955
956
957
958
959
            # metadata
            if with_meta:
                yield 'm_def', self.m_def.name
                if self.m_parent_index != -1:
                    yield 'm_parent_index', self.m_parent_index
                if self.m_parent_sub_section is not None:
                    yield 'm_parent_sub_section', self.m_parent_sub_section.name

            # quantities
960
            for name, quantity in self.m_def.all_quantities.items():
961
962
963
                if quantity.virtual:
                    continue

964
                if self.m_is_set(quantity) and quantity.derived is None:
965
                    serialize: TypingCallable[[Any], Any] = str
966
                    if isinstance(quantity.type, DataType):
967
                        serialize = lambda v: quantity.type.serialize(self, quantity, v)
968

969
                    elif quantity.type in [str, int, float, bool]:
970
                        serialize = quantity.type
971

972
                    elif type(quantity.type) == np.dtype:
973
974
                        pass

975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
                    elif isinstance(quantity.type, Enum):
                        pass

                    elif quantity.type == Any:
                        def _serialize(value: Any):
                            if type(value) not in [str, int, float, bool, list, type(None)]:
                                raise MetainfoError(
                                    'Only python primitives are allowed for Any typed non '
                                    'virtual quantities: %s of quantity %s in section %s' %
                                    (value, quantity, self))

                            return value

                        serialize = _serialize

                    else:
                        raise MetainfoError(
                            'Do not know how to serialize data with type %s for quantity %s' %
                            (quantity.type, quantity))

995
                    value = getattr(self, name)
996

997
                    if type(quantity.type) == np.dtype:
998
999
1000
1001
                        serializable_value = value.tolist()

                    else:
                        if len(quantity.shape) == 0:
1002
                            serializable_value = serialize(value)
1003
                        elif len(quantity.shape) == 1:
1004
                            serializable_value = [serialize(i) for i in value]
1005
1006
1007
1008
                        else:
                            raise NotImplementedError('Higher shapes (%s) not supported: %s' % (quantity.shape, quantity))

                    yield name, serializable_value
1009

1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
            # sub sections
            for name, sub_section_def in self.m_def.all_sub_sections.items():
                if sub_section_def.repeats:
                    if self.m_sub_section_count(sub_section_def) > 0:
                        yield name, [
                            item.m_to_dict()
                            for item in self.m_get_sub_sections(sub_section_def)]
                else:
                    sub_section = self.m_get_sub_section(sub_section_def, -1)
                    if sub_section is not None:
                        yield name, sub_section.m_to_dict()

1022
        return {key: value for key, value in items()}
1023

1024
    @classmethod
Markus Scheidgen's avatar
Markus Scheidgen committed
1025
    def m_from_dict(cls: Type[MSectionBound], dct: Dict[str, Any]) -> MSectionBound:
1026
        """ Creates a section from the given serializable data dictionary.
1027

1028
        This is the 'opposite' of :func:`m_to_dict`. It takes a deserialised dict, e.g
1029
1030
1031
1032
        loaded from JSON, and turns it into a proper section, i.e. instance of the given
        section class.
        """

1033
        section_def = cls.m_def
1034

1035
1036
1037
1038
1039
        # remove m_def, m_parent_index, m_parent_sub_section metadata,
        # they set themselves automatically
        dct.pop('m_def', None)
        dct.pop('m_parent_index', None)
        dct.pop('m_parent_sub_section', None)
1040

1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
        section = cls()

        for name, sub_section_def in section_def.all_sub_sections.items():
            if name in dct:
                sub_section_value = dct.pop(name)
                if sub_section_def.repeats:
                    for sub_section_dct in sub_section_value:
                        sub_section = sub_section_def.sub_section.section_cls.m_from_dict(sub_section_dct)
                        section.m_add_sub_section(sub_section_def, sub_section)

                else:
                    sub_section = sub_section_def.sub_section.section_cls.m_from_dict(sub_section_value)
                    section.m_add_sub_section(sub_section_def, sub_section)

        for name, quantity_def in section_def.all_quantities.items():
            if name in dct:
                quantity_value = dct[name]

                if type(quantity_def.type) == np.dtype:
                    quantity_value = np.asarray(quantity_value)

                if isinstance(quantity_def.type, DataType):
                    dimensions = len(quantity_def.shape)
                    if dimensions == 0:
                        quantity_value = quantity_def.type.deserialize(
                            section, quantity_def, quantity_value)
                    elif dimensions == 1:
                        quantity_value = list(
                            quantity_def.type.deserialize(section, quantity_def, item)
                            for item in quantity_value)
1071
                    else:
1072
1073
                        raise MetainfoError(
                            'Only numpy quantities can have more than 1 dimension.')
1074

1075
                section.m_data.dct[name] = quantity_value  # type: ignore
1076

1077
        return section
1078

1079
    def m_to_json(self, **kwargs):
1080
        """Returns the data of this section as a json string. """
1081
        return json.dumps(self.m_to_dict(), **kwargs)
1082

1083
    def m_all_contents(self) -> Iterable[Content]:
1084
        """Returns an iterable over all sub and sub subs sections. """
1085
1086
1087
        for content in self.m_contents():
            for sub_content in content[0].m_all_contents():
                yield sub_content
1088

1089
            yield content
1090

1091
    def m_contents(self) -> Iterable[Content]:
1092
        """Returns an iterable over all direct subs sections. """
1093
1094
1095
1096
1097
1098
        for sub_section_def in self.m_def.all_sub_sections.values():
            if sub_section_def.repeats:
                index = 0
                for sub_section in self.m_get_sub_sections(sub_section_def):
                    yield sub_section, index, sub_section_def, self
                    index += 1
1099

1100
1101
1102
            else:
                sub_section = self.m_get_sub_section(sub_section_def, -1)
                yield sub_section, -1, sub_section_def, self
1103

1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
    def m_path(self, quantity_def: 'Quantity' = None) -> str:
        """ Returns the path of this section or the given quantity within the section hierarchy. """
        if self.m_parent is None:
            return '/'

        if self.m_parent_index == -1:
            segment = self.m_parent_sub_section.name
        else:
            segment = '%s/%d' % (self.m_parent_sub_section.name, self.m_parent_index)

        if quantity_def is not None:
            segment = '%s/%s' % (segment, quantity_def.name)

        return '%s/%s' % (self.m_parent.m_path().rstrip('/'), segment)

    def m_root(self, cls: Type[MSectionBound] = None) -> MSectionBound:
        if self.m_parent is None:
            return cast(MSectionBound, self)
        else:
            return self.m_parent.m_root(cls)

    def m_resolve(self, path: str, cls: Type[MSectionBound] = None) -> MSectionBound:
        """ Resolves the given path using this section as context. """

        if path.startswith('/'):
            context: 'MSection' = self.m_root()
        else:
            context = self

        path_stack = path.strip('/').split('/')
        path_stack.reverse()
        while len(path_stack) > 1:
            prop_name = path_stack.pop()
            prop_def = context.m_def.all_properties.get(prop_name, None)

            if prop_def is None:
                raise ReferenceError(
                    'Could not resolve %s, property %s does not exist in %s' %
                    (path, prop_name, context.m_def))

            if isinstance(prop_def, SubSection):
                if prop_def.repeats:
                    try:
                        index = int(path_stack.pop())
                    except ValueError:
                        raise ReferenceError(
                            'Could not resolve %s, %s repeats but there is no index in the path' %
                            (path, prop_name))

                    try:
                        context = context.m_get_sub_section(prop_def, index)
                    except Exception:
                        raise ReferenceError(
                            'Could not resolve %s, there is no sub section for %s at %d' %
                            (path, prop_name, index))

                else:
                    context = context.m_get_sub_section(prop_def, -1)
                    if context is None:
                        raise ReferenceError(
                            'Could not resolve %s, there is no sub section for %s' %
                            (path, prop_name))

            elif isinstance(prop_def, Quantity):
                if len(path_stack) > 0:
                    raise ReferenceError(
                        'Could not resolve %s, %s is not a sub section' % (path, prop_name))

                return context.m_get(prop_def)

        return cast(MSectionBound, context)

1176
    def __repr__(self):
1177
        m_section_name = self.m_def.name
1178
1179
1180
1181
        # name_quantity_def = self.m_def.all_quantities.get('name', None)
        # if name_quantity_def is not None:
        #     name = self.m_get(name_quantity_def)
        try:
1182
            name = self.m_data['name']
1183
1184
        except KeyError:
            name = '<noname>'
1185
1186

        return '%s:%s' % (name, m_section_name)
1187
1188


Markus Scheidgen's avatar
Markus Scheidgen committed
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
class MCategory(metaclass=MObjectMeta):

    m_def: 'Category' = None

    @classmethod
    def __init_cls__(cls):
        # ensure that the m_def is defined
        m_def = cls.m_def
        if m_def is None:
            m_def = Category()
            setattr(cls, 'm_def', m_def)

        # transfer name and description to m_def
        m_def.name = cls.__name__
        if cls.__doc__ is not None:
1204
            m_def.description = inspect.cleandoc(cls.__doc__).strip()
Markus Scheidgen's avatar
Markus Scheidgen committed
1205
1206
1207
1208

        # add section cls' section to the module's package
        module_name = cls.__module__
        pkg = Package.from_module(module_name)
1209
        pkg.m_add_sub_section(Package.category_definitions, cls.m_def)
Markus Scheidgen's avatar
Markus Scheidgen committed
1210
1211


1212
1213
1214
1215
1216
1217
1218
# M3, the definitions that are used to write definitions. These are the section definitions
# for sections Section and Quantity.They define themselves; i.e. the section definition
# for Section is the same section definition.
# Due to this circular nature (hen-egg-problem), the classes for sections Section and
# Quantity do only contain placeholder for their own section and quantity definitions.
# These placeholder are replaced, once the necessary classes are defined. This process
# is referred to as 'bootstrapping'.
1219

1220
1221
1222
_definition_change_counter = 0


1223
1224
class cached_property:
    """ A property that allows to cache the property value.
1225
1226
1227
1228
1229

    The cache will be invalidated whenever a new definition is added. Once all definitions
    are loaded, the cache becomes stable and complex derived results become available
    instantaneous.
    """
1230
1231
1232
1233
1234
    def __init__(self, f):
        self.__doc__ = getattr(f, "__doc__")
        self.f = f
        self.change = -1
        self.values: Dict[type(self), Any] = {}
1235

1236
1237
1238
1239
1240
1241
1242
    def __get__(self, obj, cls):
        if obj is None:
            return self

        global _definition_change_counter
        if self.change != _definition_change_counter:
            self.values = {}
1243

1244
1245
1246
1247
        value = self.values.get(obj, None)
        if value is None:
            value = self.f(obj)
            self.values[obj] = value
1248
1249
1250
1251

        return value


Markus Scheidgen's avatar
Markus Scheidgen committed
1252
1253
# Metainfo M3 (i.e. definitions of definitions)

Markus Scheidgen's avatar
Markus Scheidgen committed
1254
class Definition(MSection):
1255

Markus Scheidgen's avatar
Markus Scheidgen committed
1256
    __all_definitions: Dict[Type[MSection], List[MSection]] = {}
1257

1258
1259
1260
    name: 'Quantity' = None
    description: 'Quantity' = None
    links: 'Quantity' = None
1261
    categories: 'Quantity' = None
1262

1263
1264
1265
1266
1267
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        global _definition_change_counter
        _definition_change_counter += 1

1268
1269
1270
1271
1272
        for cls in self.__class__.mro() + [self.__class__]:
            definitions = Definition.__all_definitions.setdefault(cls, [])
            definitions.append(self)

    @classmethod
Markus Scheidgen's avatar
Markus Scheidgen committed
1273
    def all_definitions(cls: Type[MSectionBound]) -> Iterable[MSectionBound]:
1274
        """ Returns all definitions of this definition class. """
Markus Scheidgen's avatar
Markus Scheidgen committed
1275
        return cast(Iterable[MSectionBound], Definition.__all_definitions.get(cls, []))
1276

1277
1278
1279
1280
    @cached_property
    def all_categories(self):
        """ All categories of this definition and its categories. """
        all_categories = list(self.categories)
Markus Scheidgen's avatar
Markus Scheidgen committed
1281
        for category in self.categories:  # pylint: disable=not-an-iterable
1282
1283
1284
1285
1286
            for super_category in category.all_categories:
                all_categories.append(super_category)

        return all_categories

1287

1288
1289
1290
1291
1292
class Property(Definition):
    pass


class Quantity(Property):
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
    """Used to define quantities that store a certain piece of (meta-)data.

    Quantities are the basic building block with meta-info data. The Quantity class is
    used to define quantities within sections. A quantity definition
    is a (physics) quantity with name, type, shape, and potentially a unit.

    In Python terms, quantities are descriptors. Descriptors define how to get, set, and
    delete values for a object attribute. Meta-info descriptors ensure that
    type and shape fit the set values.
    """

1304
1305
    type: 'Quantity' = None
    shape: 'Quantity' = None
1306
1307
    unit: 'Quantity' = None
    default: 'Quantity' = None
Markus Scheidgen's avatar
Markus Scheidgen committed
1308
    synonym_for: 'Quantity' = None
1309
    derived: 'Quantity' = None
1310
    virtual: 'Quantity' = None
1311
1312

    # TODO derived_from = Quantity(type=Quantity, shape=['0..*'])
Markus Scheidgen's avatar