473,241 Members | 1,549 Online
Bytes | Software Development & Data Engineering Community
Post Job

Home Posts Topics Members FAQ

Join Bytes to post your question to a community of 473,241 software developers and data experts.

copy.deepcopy() doesn't (for class objects): any thoughts?

bartonc
6,596 Expert 4TB
I was playing around with the Simple Metaclassing thread and found something odd:
Expand|Select|Wrap|Line Numbers
  1. >>> class aClass:
  2. ...     classVar1 = 'hello'
  3. ...     def __init__(self, arg1):
  4. ...         self.instVar1 = arg1
  5. ...         
  6. >>> anInstance = aClass('world')
  7. >>> import copy
  8. >>> bClass = copy.deepcopy(anInstance.__class__)
  9. >>> bClass
  10. <class __builtin__.aClass at 0x02FA7240>
  11. >>> aClass
  12. <class __builtin__.aClass at 0x02FA7240>
  13. >>> bClass = copy.deepcopy(aClass)
  14. >>> bClass
  15. <class __builtin__.aClass at 0x02FA7240>
Aug 25 '07 #1
0 1097

Sign in to post your reply or Sign up for a free account.

Similar topics

2
by: Nick Jacobson | last post by:
This question is with regard to the * operator as used for sequence concatenation. There's the well-known gotcha: a = ] b = a*3 b = 4 print b
6
by: Alexander Zatvornitskiy | last post by:
Hello! I have trouble with copy/deepcopy. It seems, I just don't understand something. Please explain where things goes wrong and how to do it the right way. I have one class: class...
42
by: Edward Diener | last post by:
Coming from the C++ world I can not understand the reason why copy constructors are not used in the .NET framework. A copy constructor creates an object from a copy of another object of the same...
0
by: Joshua Ginsberg | last post by:
Howdy -- I have a class that has an attribute that is a dictionary that contains an object that has a kword argument that is a lambda. Confused yet? Simplified example: import copy class...
4
by: KraftDiner | last post by:
I'm having trouble getting a copy of and object... (a deep copy) I'm writing a method that creates a mirror image of an object (on screen) In order to do this i need to get a copy of the object...
28
by: robert | last post by:
In very rare cases a program crashes (hard to reproduce) : * several threads work on an object tree with dict's etc. in it. Items are added, deleted, iteration over .keys() ... ). The threads are...
4
by: Emin | last post by:
Dear experts, I got some unexpected behavior in getattr and copy.deepcopy (see transcript below). I'm not sure if this is actually a bug in copy.deepcopy or if I'm doing something too magical...
0
by: Russell Blau | last post by:
"Marlin Rowley" <marlin_rowley@hotmail.comwrote in message news:BAY135-W134E8CAB38A2ACB2F5933F9FC60@phx.gbl... Are you trying to make a copy of the "class object" or of a class instance? What...
3
by: yoma | last post by:
python version 2.5 in module copy we all know that copy have two method: copy() and deepcopy(). and the explain is - A shallow copy constructs a new compound object and then (to the extent...
0
by: abbasky | last post by:
### Vandf component communication method one: data sharing ​ Vandf components can achieve data exchange through data sharing, state sharing, events, and other methods. Vandf's data exchange method...
2
isladogs
by: isladogs | last post by:
The next Access Europe meeting will be on Wednesday 7 Feb 2024 starting at 18:00 UK time (6PM UTC) and finishing at about 19:30 (7.30PM). In this month's session, the creator of the excellent VBE...
0
by: stefan129 | last post by:
Hey forum members, I'm exploring options for SSL certificates for multiple domains. Has anyone had experience with multi-domain SSL certificates? Any recommendations on reliable providers or specific...
1
by: davi5007 | last post by:
Hi, Basically, I am trying to automate a field named TraceabilityNo into a web page from an access form. I've got the serial held in the variable strSearchString. How can I get this into the...
0
by: MeoLessi9 | last post by:
I have VirtualBox installed on Windows 11 and now I would like to install Kali on a virtual machine. However, on the official website, I see two options: "Installer images" and "Virtual machines"....
0
by: DolphinDB | last post by:
The formulas of 101 quantitative trading alphas used by WorldQuant were presented in the paper 101 Formulaic Alphas. However, some formulas are complex, leading to challenges in calculation. Take...
0
by: DolphinDB | last post by:
Tired of spending countless mintues downsampling your data? Look no further! In this article, you’ll learn how to efficiently downsample 6.48 billion high-frequency records to 61 million...
0
by: ryjfgjl | last post by:
ExcelToDatabase: batch import excel into database automatically...
0
isladogs
by: isladogs | last post by:
The next Access Europe meeting will be on Wednesday 6 Mar 2024 starting at 18:00 UK time (6PM UTC) and finishing at about 19:15 (7.15PM). In this month's session, we are pleased to welcome back...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.