I swap in the pure Python emulator for the property type
as a part of explaining how these decorators work:
On Thu, Oct 20, 2016 at 7:45 PM, kirby urner <kirby.ur...@gmail.com> wrote:
> from model_property import Property as property
>>
>>
# -*- coding: utf-8 -*-
"""
Created on Thu Oct 20 15:45:20 2016
@author: Python.org
Emulates the built-in property type in pure Python
"""
class Property(object):
"Emulate PyProperty_Type() in Objects/descrobject.c"
def __init__(self, fget=None, fset=None, fdel=None, doc=None):
self.fget = fget
self.fset = fset
self.fdel = fdel
if doc is None and fget is not None:
doc = fget.__doc__
self.__doc__ = doc
def __get__(self, obj, objtype=None):
if obj is None:
return self
if self.fget is None:
raise AttributeError("unreadable attribute")
return self.fget(obj)
def __set__(self, obj, value):
if self.fset is None:
raise AttributeError("can't set attribute")
self.fset(obj, value)
def __delete__(self, obj):
if self.fdel is None:
raise AttributeError("can't delete attribute")
self.fdel(obj)
def getter(self, fget):
return type(self)(fget, self.fset, self.fdel, self.__doc__)
def setter(self, fset):
return type(self)(self.fget, fset, self.fdel, self.__doc__)
def deleter(self, fdel):
return Property(self.fget, self.fset, fdel, self.__doc__)
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