easy_property.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
@created: 09.07.20
@author: eisenmenger
"""
from functools import partial

import strongtyping


def action(f, frefs):

    """
    This code is original from Ruud van der Ham https://github.com/salabim/easy_property
    """
    if f.__qualname__ == action.qualname:
        if any(action.f[fref] is not None for fref in frefs.split("_")):
            raise AttributeError(f"decorator defined twice")
    else:
        action.f.update({}.fromkeys(action.f, None))  # reset all values to None
        action.qualname = f.__qualname__
    action.f.update({}.fromkeys(frefs.split("_"), f))  # set all frefs values to f

    # this line was added by myself
    action.f["setter"] = (
        strongtyping.strong_typing.match_typing(action.f["setter"])
        if action.f["setter"] is not None
        else None
    )

    return property(
        *(
            action.f[ref] if (ref != "documenter" or action.f[ref] is None) else action.f[ref](0)
            for ref in action.f
        )
    )


action.qualname = None
action.f = dict.fromkeys(["getter", "setter", "deleter", "documenter"], None)

globals().update(
    {fref: partial(action, frefs=fref) for fref in {**action.f, "getter_setter": None}}
)