optfunc2 0.2.4

Generate command line options and help/tips from function automatically.

Call function directly in cmd line

Features

1. Allow user call functions directly in command line.
2. Generate help tips automatically.
3. Add default called functions if not function was specific.

Notice

1. It's better to add argument type for each autocall functions.
2. Function with @optfunc_default has @optfunc implicitly.
3. Not support two type of variadic arguments.

Code example1 -- calculator

from optfunc2 import cmdline, cmdline_default, cmdline_start

@cmdline_default
def add(a: float, b: float):
    """add two numbers

    Args:
        a (float): The First number
        b (float): The Second number
    """
    print(f"{a} + {b} = {a + b}")

@cmdline
def multiply(x: int|float, y: int = 5):
    """multiply two numbers. The second number is optional.

    Args:
        x (int): The First number
        y (int, optional): The Second number. Defaults to 5.
    """
    print(f"{x} × {y} = {x * y}")

@cmdline
def stats(numbers: list):
    """statistics of numbers in list

    Args:
        numbers (list): Target List.
    """ 
    print(f"sum: {sum(numbers)}")
    print(f"average: {sum(numbers)/len(numbers):.2f}")

if __name__ == "__main__":
    cmdline_start(header_doc="✨ calc CLI", has_abbrev=True)

Generate help tips automatically

~/optfunc2$ python src/example_calc.py help
Usage: src/example_calc.py [command] [<args>|--help]

✨ calc CLI

commands:
    add          [default] add two numbers
    multiply     multiply two numbers. The second number is optional.
    stats        statistics of numbers in list

~/optfunc2$ python src/example_calc.py add -h
Usage: src/example_calc.py add [OPTIONS]

add two numbers


Arguments:
+-----+--------+-------+---------+-------------------+
| Opt | Abbrev |  Type | Default |        Desc       |
+-----+--------+-------+---------+-------------------+
| --a |   -a   | float |         |  The First number |
| --b |   -b   | float |         | The Second number |
+-----+--------+-------+---------+-------------------+


~/optfunc2$ python src/example_calc.py stats -h
Usage: src/example_calc.py stats [OPTIONS]

statistics of numbers in list


Arguments:
+-----------+--------+------+---------+--------------+
|    Opt    | Abbrev | Type | Default |     Desc     |
+-----------+--------+------+---------+--------------+
| --numbers |   -n   | list |         | Target List. |
+-----------+--------+------+---------+--------------+

Usage

~/optfunc2$ python src/example_calc.py add -a 2.3 -b 3
2.3 + 3.0 = 5.3
~/optfunc2$ python src/example_calc.py -a 2.3 -b 3
2.3 + 3.0 = 5.3
~/optfunc2$ python src/example_calc.py multiply -x 3
3 × 5 = 15
~/optfunc2$ python src/example_calc.py multiply -x 2.3
2.3 × 5 = 11.5
~/optfunc2$ python src/example_calc.py stats --numbers '[1, 2, 3, 4, 5]'
sum: 15
average: 3.00

Code example2 -- list files

from optfunc2 import cmdline, cmdline_default, cmdline_start
import os

@cmdline_default
def list_files(directory: str = ".", show_size: bool = False):
    """List files in a directory.

    Args:
        directory (str, optional): Target directory. Defaults to ".".
        show_size (bool, optional): Whether to show size of file. Defaults to False.
    """
    for f in os.listdir(directory):
        path = os.path.join(directory, f)
        if show_size and os.path.isfile(path):
            print(f"{f} ({os.path.getsize(path)} bytes)")
        else:
            print(f)

if __name__ == "__main__":
    cmdline_start(header_doc="📁 file manager", has_abbrev=True)

Usage

$ python src/example_file_operator.py -h
Usage: src/example_file_operator.py [command] [<args>|--help]

📁 file manager

commands:
    list_files     [default] List files in a directory.

$ python src/example_file_operator.py list_files -h
Usage: src/example_file_operator.py list_files [OPTIONS]

List files in a directory.


Arguments:
+-------------+--------+------+---------+--------------------------------------------------+
|     Opt     | Abbrev | Type | Default |                       Desc                       |
+-------------+--------+------+---------+--------------------------------------------------+
| --directory |   -d   | str  |   '.'   |        Target directory. Defaults to ".".        |
| --show_size |   -s   | bool |  False  | Whether to show size of file. Defaults to False. |
+-------------+--------+------+---------+--------------------------------------------------+
$ python src/example_file_operator.py
LICENSE.txt
.gitignore
pyproject.toml
$ python src/example_file_operator.py -s
LICENSE.txt (1081 bytes)
.gitignore (132 bytes)
pyproject.toml (719 bytes)