code: def parse_fingerprint(self, cmdline, key=None, sep=None):
      
      key = key or self.FINGERPRINT_CMD_KEY
      if key:
        sep = sep or self.FINGERPRINT_CMD_SEP
        cmdline = cmdline or []
        for cmd_part in cmdline:
          if cmd_part.startswith('{}{}'.format(key, sep)):
            return cmd_part.split(sep)[1]
docs: Given a psutil.Process.cmdline, parse and return a fingerprint.
  
      :param list cmdline: The psutil.Process.cmdline of the current process.
      :param string key: The key for fingerprint discovery.
      :param string sep: The key/value separator for fingerprint discovery.
      :returns: The parsed fingerprint or `None`.
      :rtype: string or `None`