我正在尝试使用Python单击创建cli应用程序,并且我想使用分配给click.core.Context.obj
的函数作为选项的回调函数。我用作回调函数的函数是根据输入生成的,因此无法导入该函数。
这是我的代码:
该类将分配给上下文:
class Config:
def __init__(self, func_name):
self.function = getattr(Config, func_name)
def func_a():
pass
def func_b():
pass
命令:
import click
@click.group(name='group')
@click.option('-f', '--func-name')
@pass_context
def the_group(ctx, func_name):
ctx.obj = Config(func_name)
@click.command('command')
@click.option('-o', '--my-option', callback=ctx.obj.function) # I want to use the function here
@click.pass_context
def the_command(ctx, my_option):
click.echo(my_option)
我在上面的代码中使用的回调函子不起作用。调用ctx.obj.function的正确方法是什么?
答案 0 :(得分:0)
我建议将@staticmethod
添加到您的Config
类中,以用作callback
的目标,例如:
@staticmethod
def click_callback(ctx, param, value):
getattr(ctx.obj, ctx.obj.func_name)()
return value
import click
class Config:
def __init__(self, func_name):
self.func_name = func_name
def func_a(self):
click.echo('Func A')
def func_b(self):
click.echo('Func B')
@staticmethod
def click_callback(ctx, param, value):
getattr(ctx.obj, ctx.obj.func_name)()
return value
@click.group()
@click.option('-f', '--func-name', required=True)
@click.pass_context
def group(ctx, func_name):
ctx.obj = Config(func_name)
@group.command()
@click.option('--my-option', '-o', callback=Config.click_callback)
def command(my_option):
click.echo('command: {}'.format(my_option))
if __name__ == "__main__":
commands = (
'-f func_a command -o optionA',
'-f func_b command -o optionB',
'-f func_a command -o ',
'command',
'--help',
'',
)
import sys, time
time.sleep(1)
print('Click Version: {}'.format(click.__version__))
print('Python Version: {}'.format(sys.version))
for cmd in commands:
try:
time.sleep(0.1)
print('-----------')
print('> ' + cmd)
time.sleep(0.1)
group(cmd.split())
except BaseException as exc:
if str(exc) != '0' and \
not isinstance(exc, (click.ClickException, SystemExit)):
raise
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)]
-----------
> -f func_a command -o optionA
Func A
command: optionA
-----------
> -f func_b command -o optionB
Func B
command: optionB
-----------
> -f func_a command -o
Error: -o option requires an argument
-----------
> command
Usage: test.py [OPTIONS] COMMAND [ARGS]...
Error: Missing option "-f" / "--func-name".
-----------
> --help
Usage: test.py [OPTIONS] COMMAND [ARGS]...
Options:
-f, --func-name TEXT [required]
--help Show this message and exit.
Commands:
command
-----------
>
Usage: test.py [OPTIONS] COMMAND [ARGS]...
Options:
-f, --func-name TEXT [required]
--help Show this message and exit.
Commands:
command