R. David Murray added the comment: Here is a not-much-more-complicated version that solves the problem. It is probably worth changing as the revised example makes clear the difference between self and obj, which is an important distinction.
class RevealAccess(object):
"""A data descriptor that sets and returns values
normally and prints a message logging their access.
"""
def __init__(self, initval=None, name='var'):
self.attrname = '_' + str(random.random())[2:]
self.name = name
self.initval = initval
def __get__(self, obj, objtype):
print('Retrieving', self.name)
return getattr(obj, self.attrname, self.initval)
def __set__(self, obj, val):
print('Updating', self.name)
setattr(obj, self.attrname, val)
class MyClass:
x = RevealAccess(10, 'var "x"')
y = 5
----------
nosy: +r.david.murray, rhettinger
_______________________________________
Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue31441>
_______________________________________
_______________________________________________
Python-bugs-list mailing list
Unsubscribe:
https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
