Traceback (most recent call last):
  File "/home/ryan/bin/rdsc.py", line 40, in <module>
    files += get_filenames(f)
  File "/home/ryan/bin/rdsc.py", line 13, in get_filenames
    return [os.path.join(base, elt['name']) for elt in d['Files']] + [f]
UnboundLocalError: local variable 'd' referenced before assignment