Fence matplotlib import with try block

Author: mwaskom

nipype/pipeline/plugins/base.py

@@ -109,8 +109,11 @@ def create_pyscript(node, updatehash=False, store_exception=True):
     # create python script to load and trap exception
     cmdstr = """import os
 import sys
-import matplotlib
-matplotlib.use('%s')
+try:
+    import matplotlib
+    matplotlib.use('%s')
+except ImportError:
+    pass
 from nipype import config, logging
 from nipype.utils.filemanip import loadpkl, savepkl
 from socket import gethostname