code: def decrypt(self, data, pad=None, padmode=None):
  		
  		data = self._guardAgainstUnicode(data)
  		if pad is not None:
  			pad = self._guardAgainstUnicode(pad)
  		data = self.crypt(data, des.DECRYPT)
  		return self._unpadData(data, pad, padmode)
docs: decrypt(data, [pad], [padmode]) -> bytes
  
  		data : Bytes to be encrypted
  		pad  : Optional argument for decryption padding. Must only be one byte
  		padmode : Optional argument for overriding the padding mode.
  
  		The data must be a multiple of 8 bytes and will be decrypted
  		with the already specified key. In PAD_NORMAL mode, if the
  		optional padding character is supplied, then the un-encrypted
  		data will have the padding characters removed from the end of
  		the bytes. This pad removal only occurs on the last 8 bytes of
  		the data (last data block). In PAD_PKCS5 mode, the special
  		padding end markers will be removed from the data after decrypting.