Merge pull request #1003 from BRAINSia/MakeMatplotlibOptional

BUG: matplotlib is supposed to be optional

Author: hjmjohnson

CHANGES

@@ -1,6 +1,7 @@
 Next release
 ============
 
+* BUG: matplotlib is supposed to be optional (https://github.com/nipy/nipype/pull/1003)
 * FIX: Fix split_filename behaviour when path has no file component (https://github.com/nipy/nipype/pull/1035)
 * ENH: Updated FSL dtifit to include option for grad non-linearities (https://github.com/nipy/nipype/pull/1032)
 * ENH: Updated Camino tracking interfaces, which can now use FSL bedpostx output.

nipype/pipeline/plugins/base.py

@@ -112,11 +112,15 @@ def create_pyscript(node, updatehash=False, store_exception=True):
  # create python script to load and trap exception
  cmdstr = """import os
 import sys
+
+can_import_matplotlib = True #Silently allow matplotlib to be ignored
 try:
  import matplotlib
  matplotlib.use('%s')
 except ImportError:
+ can_import_matplotlib = False
  pass
+
 from nipype import config, logging
 from nipype.utils.filemanip import loadpkl, savepkl
 from socket import gethostname
@@ -130,7 +134,9 @@ def create_pyscript(node, updatehash=False, store_exception=True):
  from collections import OrderedDict
  config_dict=%s
  config.update_config(config_dict)
- config.update_matplotlib()
+ ## Only configure matplotlib if it was successfully imported, matplotlib is an optional component to nipype
+ if can_import_matplotlib:
+ config.update_matplotlib()
  logging.update_logging(config)
  traceback=None
  cwd = os.getcwd()