fproperty - a simpler property decorator

Define the fget/fset/fdel functions and return them:

from fproperty import fproperty

class Thing:

    @fproperty
    def my_attribute():

        def fget(self):
            return self._attr

        def fset(self, value):
            self._attr = value

        def fdel(self):
            del self._attr

        return (fget, fset, fdel, "doc")

instead of property chaining:

class Thing:

    @property
    def my_attribute(self):
        return self._attr

    @my_attribute.setter
    def my_attribute(self, value):
        self._attr = value

    @my_attribute.deleter
    def my_attribute(self):
        del self._attr

which requires typing my_attribute five times, or by using the non-decorator case:

class Thing:

    def fget(self):
        return self._attr

    def fset(self, value):
        self._attr = value

    def fdel(self):
        del self._attr

    my_attribute = property(fget, fset, fdel, "doc")
    del fget, fset, fdel

which spreads out the definitions, and requires namespace cleanup.

Other examples

The fproperty decorator can be returned a partial list:

@fproperty
def set_only_attribute():
    def fset(self, value):
        self._value = value
    return (None, fset)

@property.apply

The property builtin can be substituted, and has .apply:

from fproperty import property

class Thing:
    @property.apply
    def attr():
        def g(self): pass
        return (g, )

Install

pip install fproperty

License

Licensed under the Apache License, Version 2.0 (the "License")