nipype_cmd: used str2bool utility method.

Author: glatard

nipype/utils/nipype_cmd.py

@@ -3,7 +3,7 @@
 import inspect
 import sys
 from nipype.interfaces.base import Interface
-
+from nipype.utils.misc import str2bool
 
 def listClasses(module=None):
     if module:
@@ -42,11 +42,11 @@ def run_instance(interface, options):
                     value = float(value)
                 except:
                     pass
-                # try to cast string input to boolean 
-                if value == "true" or value == "True":
-                    value = True
-                if value == "false" or value == "False":
-                    value = False
+                #try to cast string input to boolean
+                try:
+                    value = str2bool(value)
+                except:
+                    pass
                 try:
                     setattr(interface.inputs, input_name,
                             value)