Hi everyone!
I just saw a bug (?) in bson.dbref:DBRef.__getattr__
Here's they're code:
def __getattr__(self, key):
return self.__kwargs[key]
And when you do copy.deepcopy on that object it will raise you KeyError. So
here's a small piece of code that reproduces the problem:
>>> class A(object):
.. def __init__(self):
.. self.d = {}
.. def __getattr__(self, key):
.. self.d[key]
.. a = A()
.. copy.deepcopy(a)
Traceback (most recent call last):
File "<pyshell#17>", line 7, in <module>
copy.deepcopy(a)
File "/usr/lib/python2.6/copy.py", line 171, in deepcopy
copier = getattr(x, "__deepcopy__", None)
File "<pyshell#17>", line 5, in __getattr__
self.d[key]
KeyError: '__deepcopy__'
So I thought the right thing right now will be to do just:
class A(object):
def __init__(self):
self.d = {}
def __getattr__(self, key):
if key.startswith('__'):
raise AttributeError
self.d[key]
and it works, but... isn't that wrong? I mean, shouldn't deepcopy somehow work
in this situation, or, maybe, something else should differ? And why this code:
class A(object):
def __init__(self):
self.d = {}
def __getattr__(self, key):
if key in dir(self.d):
return self.d[key]
raise AttributeError
a = A()
deepcopy(a)
gets "maximum recursion depth exceeded"?
Thank you.
--
jabber: kost-be...@ya.ru
--
http://mail.python.org/mailman/listinfo/python-list
