ArgumentParser -h（帮助）将不起作用

发布于 2025-01-04 05:06:10 字数 701 浏览 1 评论 0原文

我无法让 ArgumentParser 工作。以下有什么问题：

import argparse
parser=argparse.ArgumentParser(description='''I wish this description would output''',
                                            epilog='''Please out the epilog''')

parser.add_argument('-l', type=str, default='info', help='logging level. Default is info. Use debug if you have problems.')
args=parser.parse_args()

def main():
    print("goodbye")

if __name__ == "__main__":
    #main
    main()

当我运行 myscript -h 时，我看不到任何帮助。

我在 Windows 7 上运行 Python 2.7。我的路径上有 Python，并且 pathext 设置为：

PATHEXT=.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC;.py

原文

I cannot get ArgumentParser to work. What's wrong with the following:

import argparse
parser=argparse.ArgumentParser(description='''I wish this description would output''',
                                            epilog='''Please out the epilog''')

parser.add_argument('-l', type=str, default='info', help='logging level. Default is info. Use debug if you have problems.')
args=parser.parse_args()

def main():
    print("goodbye")

if __name__ == "__main__":
    #main
    main()

When I run myscript -h I see no help.

I am running Python 2.7 on Windows 7. I have Python on my path and also pathext set as:

PATHEXT=.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC;.py

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琉璃繁缕 2025-01-11 05:06:10

argsparse 代码实际上从未被执行。通过从命令行执行脚本，您将调用 main()，它只会打印并退出。您必须在 main() 函数中调用 parse_args() 才能正常工作。

import argparse

# Personally, I think these belong in the main()
# function as well, but they don't need to be.
parser = argparse.ArgumentParser(
    description="I wish this description would output",
    epilog="Please out the epilog"
)
parser.add_argument(
    "-l",
    type=str,
    default="info",
    help="logging level. Default is info. Use debug if you have problems."
)

def main():
    args = parser.parse_args() # Parses arguments
    print("goodbye")

if __name__ == "__main__":
    main() # Calls main

产生：

~/Desktop $ python untitled.py --help
usage: untitled.py [-h] [-l L]

I wish this description would output

optional arguments:
  -h, --help  show this help message and exit
  -l L        logging level. Default is info. Use debug if you have problems.

Please out the epilog

jcollado 声称你的代码在 Ubuntu 上运行良好 - 我觉得这很好奇。

The argsparse code never actually gets executed. By executing the script from the command line, you're calling main(), which simply prints and exits. You have to call parse_args() in the main() function for this to work.

import argparse

# Personally, I think these belong in the main()
# function as well, but they don't need to be.
parser = argparse.ArgumentParser(
    description="I wish this description would output",
    epilog="Please out the epilog"
)
parser.add_argument(
    "-l",
    type=str,
    default="info",
    help="logging level. Default is info. Use debug if you have problems."
)

def main():
    args = parser.parse_args() # Parses arguments
    print("goodbye")

if __name__ == "__main__":
    main() # Calls main

Produces:

~/Desktop $ python untitled.py --help
usage: untitled.py [-h] [-l L]

I wish this description would output

optional arguments:
  -h, --help  show this help message and exit
  -l L        logging level. Default is info. Use debug if you have problems.

Please out the epilog

jcollado claims your code worked fine on Ubuntu--I find this very curious.

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