aarghparse
Motivation
I was having shower and this name came up.
At the moment this is a collection of argparse extensions I have written and found useful in recent times.
Features
-
@arg_converterdecorator to write simple argument value parsers without theargparse.Actionboilerplate -
@subcommanddecorator to save you from all theadd_subparsersandset_defaults(func=). -
@clidecorator to generate a command-line interface.
Example
The example below combines all the features, but the tool doesn't enforce it on you.
If you have an existing argparse.ArgumentParser definition, you should be able to replace it with aarghparse
by just changing the initialisation line to parser = aarghparse.ArgumentParser(...).
import datetime as dt
import dateutil.tz
from aarghparse import ArgumentParser, arg_converter, cli
@cli
def calendar_cli(parser: ArgumentParser, subcommand: ArgumentParser.subcommand):
"""
Command-line calendar.
"""
parser.add_argument(
'--date-format',
default=None,
)
@arg_converter
def tz_arg(value):
return dateutil.tz.gettz(value)
@subcommand(
name="now",
args=[
["--tz", {
"action": tz_arg,
"help": "Timezone",
}],
],
)
def now_cmd(args):
"""
Prints today's date.
"""
date_format = args.date_format or "%Y-%m-%d %H:%M:%S"
print(dt.datetime.now(tz=args.tz).strftime(date_format))
if __name__ == "__main__":
calendar_cli.run()If you install python-dateutil then you can try the above with:
python -m aarghparse.examples.calendar --help
python -m aarghparse.examples.calendar now --help
python -m aarghparse.examples.calendar now --tz "Europe/Riga"
python -m aarghparse.examples.calendar --date-format "%d.%m.%Y." now --tz "Europe/Riga"
