Import cleanups

nifty4/field.py

@@ -23,7 +23,6 @@ from . import utilities
 from .domain_tuple import DomainTuple
 from functools import reduce
 from . import dobj
-import sys
 
 __all__ = ["Field", "sqrt", "exp", "log", "conjugate"]
 

nifty4/library/noise_energy.py

@@ -16,7 +16,6 @@
 # NIFTy is being developed at the Max-Planck-Institut fuer Astrophysik
 # and financially supported by the Studienstiftung des deutschen Volkes.
 
-from ..field import Field
 from ..sugar import exp
 from ..minimization.energy import Energy
 from ..operators.diagonal_operator import DiagonalOperator

nifty4/minimization/l_bfgs.py

@@ -17,11 +17,12 @@
 # and financially supported by the Studienstiftung des deutschen Volkes.
 
 from __future__ import division
+
 from builtins import range
-import numpy as np
+
+from ..logger import logger
 from .descent_minimizer import DescentMinimizer
 from .line_search_strong_wolfe import LineSearchStrongWolfe
-from ..logger import logger
 
 
 class L_BFGS(DescentMinimizer):

nifty4/operators/chain_operator.py

@@ -17,7 +17,6 @@
 # and financially supported by the Studienstiftung des deutschen Volkes.
 
 from .linear_operator import LinearOperator
-import numpy as np
 
 
 class ChainOperator(LinearOperator):

nifty4/operators/linear_operator.py

@@ -17,7 +17,6 @@
 # and financially supported by the Studienstiftung des deutschen Volkes.
 
 import abc
-
 import numpy as np
 
 from ..utilities import NiftyMetaBase

nifty4/operators/sandwich_operator.py

@@ -17,7 +17,6 @@
 # and financially supported by the Studienstiftung des deutschen Volkes.
 
 import numpy as np
-
 from .linear_operator import LinearOperator
 from .diagonal_operator import DiagonalOperator
 from .endomorphic_operator import EndomorphicOperator