Question

我正在开发一个项目，允许用户通过添加必要的参数来设置上传文件的路径，但无论出于何种原因，upload_destination变量始终为空！这是我的代码

def main():
  global listen
  global port
  global execute
  global command
  global upload_destination
  global target

  if not len(sys.argv[1:]):
     usage()
  try:
     opts, args = getopt.getopt(sys.argv[1:], "hle:t:p:cu", ["help", "listen", "execute", "target", "port", "command", "upload"])
  except getopt.GetoptError as err:
     print str(err)
     usage()

  for o,a in opts:
     if o in ("-h", "--help"):
         usage()
     elif o in ("-l", "--listen"):
         listen = True
     elif o in ("-e", "--execute"):
         execute = True
     elif o in ("-c", "--commandshell"):
         command = True
     elif o in ("-u", "--upload"):
         #Here's the problem, a is empty even though I include a path
         upload_destination = a
     elif o in ("-t", "--target"):
         target = a
     elif o in ("-p", "--port"):
         port = int(a)
     else:
         assert False, "Unhandled Option"

  if not listen and len(target) and port > 0:
     buffer = sys.stdin.read()
     client_sender(buffer)

  if listen:
     server_loop()

我通过输入

来调用该程序

C:\Users\Asus\Desktop\PythonTest>python test.py -l -c -p 3500 -u C:\Users\Asus\Desktop\Test

Answer 1

这是一个简单的缺少冒号:。

https://docs.python.org/2/library/getopt.html

options是脚本想要识别的选项字母串，其中的选项需要一个后跟冒号的参数（'：';即，与Unix getopt（）使用的格式相同）。

将"hle:t:p:cu"更改为"hle:t:p:cu:"它应该可以使用（至少它适用于Win7 / Python3.5）。

当您使用代码执行print(opts, args)时，您会得到：

([('-l', ''), ('-c', ''), ('-p', '3500'), ('-u', '')], ['C:UsersAsusDesktopTest'])

添加冒号后会变成：

([('-l', ''), ('-c', ''), ('-p', '3500'), ('-u', 'C:UsersAsusDesktopTest')], [])

没有冒号C:\Users\...成为新的参数。

Python得到传递的参数

1 个答案: