fixed bug where parfield creation would crash in Python3 due to raw_input call

python/parfield/dorie/parfield/parameter_file.py

@@ -2,6 +2,11 @@ import os
 import h5py
 import numpy as np
 
+try: # Python 2.x compatibility
+    input = raw_input
+except NameError:
+    pass
+
 def read_parameter_file(in_path):
     data_dict = {}
     with h5py.File(in_path, 'r') as f:
@@ -32,7 +37,7 @@ def write_parameter_file(group,data_dict,out_path,attrs=None,overwrite=False):
 
         """
         if os.path.isfile(out_path) and not overwrite:
-            ow = raw_input("The output file {} already exists. Overwrite? [y/N] ".format(out_path))
+            ow = input("The output file {} already exists. Overwrite? [y/N] ".format(out_path))
             if not ow.lower() in ["y","yes"]:
                 raise RuntimeError("Aborting")