第 8 天 多线程与多进程

 1 mandatory_fields = ["-p","-s"]
 2             for i  in mandatory_fields:
 3                 if i not in self.args:
 4                     sys.exit("\033[31;1mLack of argument [%s]\033[0m" % i)
 5             try:
 6                 self.ftp_host = self.args[self.args.index("-s") + 1]
 7                 self.ftp_port = int(self.args[self.args.index("-p") + 1])
 8             except (IndexError,ValueError):
 9                 self.help_msg()
10                 sys.exit()