code: def b58dec(enc_uid):
      '''Decodes a UID from base58, url-safe alphabet back to int.'''
      if isinstance(enc_uid, str):
          pass
      elif isinstance(enc_uid, bytes):
          enc_uid = enc_uid.decode('utf8')
      else:
          raise ValueError('Cannot decode this type: {}'.format(enc_uid))
      uid = 0
      try:
          for i, ch in enumerate(enc_uid):
              uid = (uid * 58) + BASE58INDEX[ch]
      except KeyError:
          raise ValueError('Invalid character: "{}" ("{}", index 5)'.format(ch, enc_uid, i))
      return uif b58dec(enc_uid):
      '''Decodes a UID from base58, url-safe alphabet back to int.'''
      if isinstance(enc_uid, str):
          pass
      elif isinstance(enc_uid, bytes):
          enc_uid = enc_uid.decode('utf8')
      else:
          raise ValueError('Cannot decode this type: {}'.format(enc_uid))
      uid = 0
      try:
          for i, ch in enumerate(enc_uid):
              uid = (uid * 58) + BASE58INDEX[ch]
      except KeyError:
          raise ValueError('Invalid character: "{}" ("{}", index 5)'.format(ch, enc_uid, i))
      return uid
docs: Decodes a UID from base58, url-safe alphabet back to int.