如何在 Click 中创建互斥选项组？我想要么接受标志“--all”，要么接受带有“--color red”等参数的选项。
最佳答案
我最近遇到了同样的用例；这就是我想出的。对于每个选项，您可以给出一个冲突选项列表。
from click import command, option, Option, UsageError
class MutuallyExclusiveOption(Option):
def __init__(self, *args, **kwargs):
self.mutually_exclusive = set(kwargs.pop('mutually_exclusive', []))
help = kwargs.get('help', '')
if self.mutually_exclusive:
ex_str = ', '.join(self.mutually_exclusive)
kwargs['help'] = help + (
' NOTE: This argument is mutually exclusive with '
' arguments: [' + ex_str + '].'
)
super(MutuallyExclusiveOption, self).__init__(*args, **kwargs)
def handle_parse_result(self, ctx, opts, args):
if self.mutually_exclusive.intersection(opts) and self.name in opts:
raise UsageError(
"Illegal usage: `{}` is mutually exclusive with "
"arguments `{}`.".format(
self.name,
', '.join(self.mutually_exclusive)
)
)
return super(MutuallyExclusiveOption, self).handle_parse_result(
ctx,
opts,
args
)
然后使用常规的 option 装饰器，但传递 cls 参数:
@command(help="Run the command.")
@option('--jar-file', cls=MutuallyExclusiveOption,
help="The jar file the topology lives in.",
mutually_exclusive=["other_arg"])
@option('--other-arg',
cls=MutuallyExclusiveOption,
help="The jar file the topology lives in.",
mutually_exclusive=["jar_file"])
def cli(jar_file, other_arg):
print "Running cli."
print "jar-file: {}".format(jar_file)
print "other-arg: {}".format(other_arg)
if __name__ == '__main__':
cli()
Here's a gist 包含上面的代码并显示运行它的输出。
如果这对您不起作用，还有一些(已关闭的)问题在 click github 页面上提到了这一点，其中包含一些您可能可以使用的想法。
关于python - python中的互斥选项组单击，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/37310718/