More debug out on import error.

pymolfile/plugin_list.py

@@ -4,6 +4,8 @@ import sys
 try:
     from .molfile import libpymolfile
 except ImportError:
+    import traceback
+    traceback.print_exc()
     warnings.warn("libpymolfile package not available, pymolfile does not work without its library!")
 
 MAX_NUM_PLUGINS = 200
@@ -18,8 +20,8 @@ def byte_str_decode(data, dectype=None):
 def plugins():
     """ Information on the available molfile plugins
 
-        Example tuple: ('psf', 'psf', 1, 1, 1, 0, 1, 1, 1, 0, 
-            'CHARMM,NAMD,XPLOR PSF', 'mol file reader', 
+        Example tuple: ('psf', 'psf', 1, 1, 1, 0, 1, 1, 1, 0,
+            'CHARMM,NAMD,XPLOR PSF', 'mol file reader',
             'Justin Gullingsrud, John Stone', 1, 9, 17, 1)
 
         The fields in the tuple represent info in ordered as follows:
@@ -39,18 +41,18 @@ def plugins():
            14: major version of the plugin
            15: minor version of the plugin
            16: ABI version of the plugin
-           17: 1 if is reentrant (returns is_reentrant) 
+           17: 1 if is reentrant (returns is_reentrant)
 
-    Returns: A list of tuples that includes the information and 
-             capabilities of each molfile plugin. The information is 
-             extracted from molfile_plugin_t. 
+    Returns: A list of tuples that includes the information and
+             capabilities of each molfile plugin. The information is
+             extracted from molfile_plugin_t.
     """
     global C_MOLFILE_PLUGINS
     numlist = libpymolfile.molfile_init()
     if sys.version_info > (3,):
         basestring = str
     plugins_list = [
-        [byte_str_decode(item, 
+        [byte_str_decode(item,
             dectype="unicode_escape") for item in libpymolfile.molfile_plugin_info(
             C_MOLFILE_PLUGINS, i)
             ] for i in range(numlist)