argparse_decoration

A argparse wrapper through decorations

30 sec tutorial

Given test.py with:

#!/bin/python3

from argparse_decorations import init, Command, parse_and_run

init()

@Command('mycommand')
def handler():
    print('Hello!')

parse_and_run()

then ./test.py produces:

usage: test.py [-h] {mycommand} ...

Help message

positional arguments:
  {mycommand}

options:
  -h, --help   show this help message and exit

and ./test.py mycommand:

Hello!

1 min tutorial

The program:

from argparse_decorations import init, Command, SubCommand, Argument, parse_and_run

init()

@Command('mycommand')
@SubCommand('add')
@Argument('a', type=int)
@Argument('b', type=int)
def add_handler_but_could_be_any_identifier(a, b):
    print(a + b)

parse_and_run()

when called ./test.py mycommand add 1 2 produces:

3

@Command and @SubCommand will make a call to ArgumentParser.add_parser() and @Argument will call ArgumentParser.add_argument These calls are made 'as-is' passing every *args and **kwargs passed on decorations to commands

A complete example whose explore all possibilities:

@Command('math')
@SubCommand('add')
@Argument('valueA', type=int)
@Argument('valueB', type=int)
def add_handler(valueA, valueB):
    print('Adding args ' + str(valueA) + ' and ' + str(valueB))
    print(valueA + valueB)


@Command('math')
@SubCommand('sub')
@Argument('valueA', type=int)
@Argument('valueB', type=int)
def subtract_handler(valueA, valueB):
    print('Subtracting args ' + str(valueA) + ' and ' + str(valueB))
    print(valueA - valueB)


@Command('math')
@SubCommand('mul')
@Argument('valueA', type=int)
@Argument('valueB', type=int)
def subtract_handler(valueA, valueB):
    print('Multiplying args ' + str(valueA) + ' and ' + str(valueB))
    print(valueA * valueB)


@Command('math')
@SubCommand('pi')
def pi():
    print('3.1415926535979')