无法使argparse读取带破折号的带引号的字符串吗? [英] Can't get argparse to read quoted string with dashes in it?

问题描述

是否有一种方法可以使argparse将两个引号之间的任何内容识别为单个参数?似乎不断看到破折号，并假设这是一个新选项的开始

Is there a way to make argparse recognize anything between two quotes as a single argument? It seems to keep seeing the dashes and assuming that it's the start of a new option

我有类似的东西:

mainparser = argparse.ArgumentParser()
subparsers = mainparser.add_subparsers(dest='subcommand')
parser = subparsers.add_parser('queue')
parser.add_argument('-env', '--extraEnvVars', type=str,
                        help='String of extra arguments to be passed to model.')
...other arguments added to parser...

但是当我跑步时:

python Application.py queue -env "-s WHATEVER -e COOL STUFF"

它给了我

Application.py queue: error: argument -env/--extraEnvVars: expected one argument

如果我不使用第一个破折号，那么它可以很好地工作，但是能够输入带有破折号的字符串是至关重要的.我尝试用\进行转义，这会导致它成功，但是会将\添加到参数字符串中.有人知道如何解决这个问题吗?无论-s是否是解析器中的参数，都会发生这种情况.

If I leave off the first dash, it works totally fine, but it's kind of crucial that I be able to pass in a string with dashes in it. I've tried escaping it with \ , which causes it to succeed but adds the \ to the argument string Does anyone know how to get around this? This happens whether or not -s is an argument in parser.

我正在使用Python 2.7.

I'm using Python 2.7.

python Application.py -env " -env"

工作正常，但是

python Application.py -env "-env"

没有.

看起来这实际上是一个已经在讨论中的错误: http://www.gossamer -threads.com/lists/python/bugs/89529 ，

Looks like this is actually a bug that's being debated already: http://www.gossamer-threads.com/lists/python/bugs/89529, http://python.6.x6.nabble.com/issue9334-argparse-does-not-accept-options-taking-arguments-beginning-with-dash-regression-from-optp-td578790.html. It's only in 2.7 and not in optparse.

当前打开的错误报告为: http://bugs.python.org/issue9334

The current open bug report is: http://bugs.python.org/issue9334

推荐答案

您可以使用空格python tst.py -e ' -e blah'来启动自变量，这是一个非常简单的解决方法.如果愿意，只需lstrip()将其恢复正常的选项.

You can start the argument with a space python tst.py -e ' -e blah' as a very simple workaround. Simply lstrip() the option to put it back to normal, if you like.

或者，如果第一个子参数"也不是原始函数的有效参数，那么您根本不需要执行任何操作.也就是说，python tst.py -e '-s hi -e blah'不起作用的唯一原因是因为-s是tst.py的有效选项.

Or, if the first "sub-argument" is not also a valid argument to the original function then you shouldn't need to do anything at all. That is, the only reason that python tst.py -e '-s hi -e blah' doesn't work is because -s is a valid option to tst.py.

此外，现已弃用的 optparse 模块可以正常使用.

Also, the optparse module, now deprecated, works without any issue.

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