我試圖了解有關(guān) Click 的一些實現(xiàn)細節(jié)。我有以下示例代碼：#cli.pyimport click@click.group()def cli(): pass@cli.group()def show(): """ Define the environment of the product """ pass@show.command()def name(): click.echo("run show name command")@show.command()def height(): click.echo("run show height command")if __name__ == "__main__": cli()與此代碼，name并且height是子命令的的show基團。但是，從語義上講，這并沒有什么意義。他們越是這樣的論點一個“show”命令的。我知道我可以有一個帶有“屬性”參數(shù)的命令，我可以根據(jù)“屬性”的字符串值從中調(diào)用不同的函數(shù)。但是，我覺得一旦“屬性”有幾種可能性，維護起來會很乏味。我相信如果我能夠編輯幫助消息，我仍然可以使用上述結(jié)構(gòu)。當我運行時cli.py show --help，我會收到命令組的默認幫助消息：Usage: cli.py show [OPTIONS] COMMAND [ARGS]... Define the environment of the productOptions: --help Show this message and exit.Commands: height name有沒有辦法編輯幫助消息以將“命令”更改為“參數(shù)”？我知道如何更改 click.group() 裝飾器中的使用聲明，但我不確定如何修改幫助消息本身。我想實現(xiàn)的幫助信息如下：Usage: cli.py show [OPTIONS] ARG Define the environment of the productOptions: --help Show this message and exit.Arguments: height name這樣的事情可能嗎？
1 回答
楊__羊羊
TA貢獻1943條經(jīng)驗 獲得超7個贊
您可以通過使用組的自定義類來更改子命令 help 給出的消息?？梢酝ㄟ^繼承click.Group和更改format_commands()方法來創(chuàng)建自定義類，例如：
自定義類：
class HelpAsArgs(click.Group):
# change the section head of sub commands to "Arguments"
def format_commands(self, ctx, formatter):
rows = []
for subcommand in self.list_commands(ctx):
cmd = self.get_command(ctx, subcommand)
if cmd is None:
continue
help = cmd.short_help or ''
rows.append((subcommand, help))
if rows:
with formatter.section('Arguments'):
formatter.write_dl(rows)
測試代碼：
import click
@click.group()
def cli():
pass
@cli.group(cls=HelpAsArgs)
def show():
""" Define the environment of the product """
pass
@show.command()
def name():
click.echo("run show name command")
@show.command()
def height():
click.echo("run show height command")
if __name__ == "__main__":
commands = (
'show',
'show --help',
'--help',
)
import sys, time
time.sleep(1)
print('Click Version: {}'.format(click.__version__))
print('Python Version: {}'.format(sys.version))
for command in commands:
try:
time.sleep(0.1)
print('-----------')
print('> ' + command)
time.sleep(0.1)
cli(command.split())
except BaseException as exc:
if str(exc) != '0' and \
not isinstance(exc, (click.ClickException, SystemExit)):
raise
結(jié)果：
Click Version: 6.7
Python Version: 3.6.3 (v3.6.3:2c5fed8, Oct 3 2017, 18:11:49) [MSC v.1900 64 bit (AMD64)]
-----------
> show
Usage: test.py show [OPTIONS] COMMAND [ARGS]...
Define the environment of the product
Options:
--help Show this message and exit.
Arguments:
height
name
-----------
> show --help
Usage: test.py show [OPTIONS] COMMAND [ARGS]...
Define the environment of the product
Options:
--help Show this message and exit.
Arguments:
height
name
-----------
> --help
Usage: test.py [OPTIONS] COMMAND [ARGS]...
Options:
--help Show this message and exit.
Commands:
show Define the environment of the product
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