fix: interfaces/utility.py: remove dumps and loads

Author: alexsavio

nipype/interfaces/utility.py

@@ -18,6 +18,7 @@
 import os
 import re
 from pickle import dumps
+from textwrap import dedent
 import numpy as np
 import nibabel as nb
 
@@ -407,7 +408,7 @@ def __init__(self, input_names, output_names, function=None, imports=None,
                                     'function objects defined interactively ' \
                                     'in a python session')
             elif isinstance(function, str):
-                self.inputs.function_str = dumps(function)
+                self.inputs.function_str = function
             else:
                 raise Exception('Unknown type of function')
         self.inputs.on_trait_change(self._set_function_string,
@@ -425,7 +426,7 @@ def _set_function_string(self, obj, name, old, new):
             if hasattr(new, '__call__'):
                 function_source = getsource(new)
             elif isinstance(new, str):
-                function_source = dumps(new)
+                function_source = new
             self.inputs.trait_set(trait_change_notify=False,
                                   **{'%s' % name: function_source})