tags:

views:

1495

answers:

1
+2  Q: 

Python dictionary deepcopy

+5  A: 

The documentation makes it pretty clear that you're getting new copies, not references. Deepcopy creates deep copies for built in types, with various exceptions and that you can add custom copy operations to your user-defined objects to get deep copy support for them as well. If you're not sure, well that's what unit testing is for.

apphacker  2009-05-08 07:49:17
I dont think it states built in types, it states that it does “copy” the pickable objects... Does that mean I would get a new list reference?
mandel  2009-05-08 07:58:44
Deepcopy has a short list of exceptions. Everything else is copied."This module does not copy types like module, method, stack trace, stack frame, file, socket, window, array, or any similar types." You get a new list. Not a reference to the list but a new list. Print the two dictionaries from your example and look at them.
S.Lott  2009-05-08 10:21:18

related questions

Programmatically talking to a Serial Port in OS X or Linux
Best ways to teach a beginner to program?
Calling a Function From a String With the Function's Name in Python
An executable Python app
Text Editor For Linux (Besides Vi)?
What Hosting Service is best for Django applications?
File size differences after copying a file to a server vía FTP
Python: what is the difference between (1,2,3) and [1,2,3], and when should I use each?
Python: What OS am I running on?
How do I make a menu in python that does not require the user to press (enter) to make a selection?
How do you express binary literals in Python?
What is the most efficient graph data structure in Python?
Adding a Method to an Existing Object
How to learn Python: Good Example Code?
How do I use Python's itertools.groupby()?
Python and MySQL
Class views in Django
Is there an IDE that provides code completion for Python
Using 'in' to match an attribute of Python objects in an array
cx_Oracle - what is the best way to iterate over a result set?
cx_Oracle - How do I access Oracle from Python?
Continuous Integration System for a Python Codebase
Get a preview jpeg of a pdf on windows?
How can I find the full path to a font from its display name on a Mac?
XML Processing in Python