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by: Jp Calderone |
last post by:
In trying to update some code built on top of reload(), I've hit a point
of confusion in how it is determined whether or not __class__ is allowed to
be rebound.
Consider, for example:
>>> class Foo(object):
... __slots__ = 'a', 'b'
...
>>> class Bar(object):
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by: Ellinghaus, Lance |
last post by:
> > Other surprises: Deprecating reload()
>Reload doesn't work the way most people think
>it does: if you've got any references to the old module,
>they stay around. They aren't replaced.
>It was a good idea, but the implementation simply
>doesn't do what the idea promises.
I agree that it does not really work as most people think it does, but how
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by: Ron Garret |
last post by:
Why doesn't this work?
>>> from weakref import ref
>>> class C(str): pass
....
>>> ref(C())
Traceback (most recent call last):
File "<stdin>", line 1, in ?
TypeError: cannot create weak reference to 'C' object
>>>
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by: Rhamphoryncus |
last post by:
I know __del__ can't be relied on to do cleanup, so I'm thinking of
using a globally reachable weakref to do the job, like so:
import weakref
class Foo:
def __init__(self, *args, **kwargs):
self.__realfoo = RealFoo(self, *args, **kwargs)
def blah(self):
return self.__realfoo.blah()
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by: Michael Schneider |
last post by:
Hello All,
I am comming back to python after being away for several years.
I would like to use weak refs in an observer pattern implementation.
The problme that I have seems to be that weakrefs can't manage functions.
------------------- from docs:
http://www.python.org/doc/current/lib/module-weakref.html
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by: Kamilche |
last post by:
'''
event.py
An event manager using publish/subscribe, and weakrefs.
Any function can publish any event without registering it first, and
any
object can register interest in any event, even if it doesn't exist
yet.
The event manager uses weakrefs, so lists of listeners won't stop them
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by: Mathias Panzenboeck |
last post by:
Hi.
I have a problem with weak refs and bound methods. The best explanation for the
problem is a short bit of code. I have the three classes Wrapper, Foo and Bar:
import weakref
class Wrapper(object):
def __init__(self,x):
self.x = weakref.ref(x)
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by: Odalrick |
last post by:
I'm trying to write a simple game and decided I need an eventmanager.
<code>
import weakref
from collections import defaultdict
class _EventManager( object ):
def __init__( self ):
self._handled_events =
defaultdict( weakref.WeakKeyDictionary )
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by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it.
First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
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by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed.
This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
|
by: Hystou |
last post by:
Overview:
Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
|
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by: tracyyun |
last post by:
Dear forum friends,
With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
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by: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM).
In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules.
He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms.
Adolph will...
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by: conductexam |
last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one.
At the time of converting from word file to html my equations which are in the word document file was convert into image.
Globals.ThisAddIn.Application.ActiveDocument.Select();...
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by: TSSRALBI |
last post by:
Hello
I'm a network technician in training and I need your help.
I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs.
The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols.
I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
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by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
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by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
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