message: samples(python): fix drive handling in source path
diff: @@ -32,6 +32,8 @@ Keys:
  # Python 2/3 compatibility
  from __future__ import print_function
  +import re
  +
  import numpy as np
  from numpy import pi, sin, cos
  @@ -169,11 +171,11 @@ def create_capture(source = 0, fallback = presets['chess']):
  '''source: <int> or '<int>|<filename>|synth [:<param_name>=<value> [:...]]'
  '''
  source = str(source).strip()
  +
  + # Win32: handle drive letter ('c:', ...)
  + source = re.sub(r'(^|=)([a-zA-Z]):([/\\a-zA-Z0-9])', r'\1?disk\2?\3', source)
  chunks = source.split(':')
  - # handle drive letter ('c:', ...)
  - if len(chunks) > 1 and len(chunks[0]) == 1 and chunks[0].isalpha():
  - chunks[1] = chunks[0] + ':' + chunks[1]
  - del chunks[0]
  + chunks = [re.sub(r'\?disk([a-zA-Z])\?', r'\1:', s) for s in chunks]
  source = chunks[0]
  try: source = int(source)
  