code: def parse257(resp):
      """Parse the '257' response for a MKD or PWD request.
      This is a response to a MKD or PWD request: a directory name.
      Returns the directoryname in the 257 reply."""
      if resp[:3] != "257":
          raise error_reply(resp)
      if resp[3:5] != ' "':
          return ""  # Not compliant to RFC 959, but UNIX ftpd does this
      dirname = ""
      i = 5
      n = len(resp)
      while i < n:
          c = resp[i]
          i = i + 1
          if c == '"':
              if i >= n or resp[i] != '"':
                  break
              i = i + 1
          dirname = dirname + c
      return dirname
  
imports: import sys
  import socket
  from socket import _GLOBAL_DEFAULT_TIMEOUT
label_desc: Use image node_id 4 for calling a global function with example usage: parse257(resp) and returns: dirname, str