classical.py 文件源码

def morse_decode(text, dot='.', dash='-', space=' '):
   '''
   Decodes a Morse encoded message. Optionally, you can provide an alternate
   single character for dot, dash, and space.

   Parameters:
   text - (string) A message to decode
   dot - (char) An alternate dot char
   dash - (char) An alternate dash char
   space - (char) A char to split the text on
   '''
   inverse_morse_table = map(lambda (x,y): (y,x), morse_table.items())
   dot_dash_trans = string.maketrans('.-', dot+dash)
   inverse_morse_table = [(string.translate(x,dot_dash_trans), y) for (x,y) in inverse_morse_table]
   inverse_morse_table = dict(inverse_morse_table)
   return ''.join([inverse_morse_table[char] for char in text.split(space) if char in inverse_morse_table.keys()])