python单击帮助格式化换行符 [英] python click help formatting newline
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问题描述
我看到我的EPILOG中没有保留换行符吗?我想知道为什么只在一行包含74
个字符时看到换行符吗?
I am seeing that a newline is not being preserved in my EPILOG? I want to know why if I see that newline remains only when a line has 74
characters?
# http://click.pocoo.org/5/commands/
import click, sys
def main_caller(*args, **kwargs):
print('act on arguments', args, kwargs)
EPILOG = '''
# oneline
# twoline
\n
# oneline with 74char x
# twoline with 74char x
'''
@click.group(help='wwwwwwwwww', epilog=EPILOG, invoke_without_command=True, chain=True)
@click.argument('start_or_stop')
@click.option('-v', '--verbose', default=False, help='Print Verbose messages')
@click.option('-l', '--logfile', help='Path to logfile to store log messages')
@click.option('-a', '--action', multiple=True, type=click.Choice(['act1', 'act2', 'act3']), default=['act1', 'act2'])
def cli(*args, **kwargs):
'''foo bar'''
pass
@cli.command()
@click.option('--debug/--no-debug', default=False)
def cmd1(*args, **kwargs):
print('cmd1', args, kwargs)
return 'cmd11111'
@cli.command()
@click.option('-x', '--xxx', default='x')
def cmd2(*args, **kwargs):
print('cmd2', args, kwargs)
return 'cmd22222'
@cli.resultcallback()
def process_pipeline(*args, **kwargs):
print('process', args, kwargs)
print('args', sys.argv[1:])
if __name__ == '__main__':
cli()
输出为:
/click_sandbox.py --help
2017/02/24 19:31:43 Platform overridden to 'RHEL5_64'
Usage: click_sandbox.py [OPTIONS] START_OR_STOP COMMAND1 [ARGS]... [COMMAND2
[ARGS]...]...
wwwwwwwwww
Options:
-v, --verbose TEXT Print Verbose messages
-l, --logfile TEXT Path to logfile to store log messages
-a, --action [act1|act2|act3]
--help Show this message and exit.
Commands:
cmd1
cmd2
# oneline # twoline
# oneline with 74char x
# twoline with 74char x
推荐答案
由于Epilog作者进行自动换行,因此未保留您的换行符.通过创建不进行自动换行的format_epilog()
,可以使用click.Group
的子类来解决此问题:
Your newlines are not being preserved because the epilog writer does word wrapping. This can be solved with a subclass to click.Group
, by creating a format_epilog()
which does not do word wrapping:
class SpecialEpilog(click.Group):
def format_epilog(self, ctx, formatter):
if self.epilog:
formatter.write_paragraph()
for line in self.epilog.split('\n'):
formatter.write_text(line)
# Tell click to use our epilog formatter
@click.group(cls=SpecialEpilog,
help='wwwwwwwwww', epilog=EPILOG, invoke_without_command=True, chain=True)
....
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