Mar 18, 2010 · When we do a .copy() on dictionary, by default, it will only do a shallow copy, which means it copies all the immutable values into a new dictionary but does not copy the mutable values, …

Feb 24, 2011 · 653 I would like to make a deep copy of a dict in python. Unfortunately the .deepcopy() method doesn't exist for the dict. How do I do that?

Jan 7, 2012 · I want to copy a dictionary into a new variable without maintaining the link with previous variable.

I have a Python program that works with dictionaries a lot. I have to make copies of dictionaries thousands of times. I need a copy of both the keys and the associated contents. The copy will be ed...

Using .copy () to create a copy of a dictionary that can be editing without altering the original dictionary Asked 5 years, 9 months ago Modified 5 years, 9 months ago Viewed 3k times

May 8, 2009 · 16 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 …

Oct 1, 2014 · 8 How can i copy a dictionary of lists and what is its complexity? The dictionary I'm tryint to copy is something like this:

Sep 13, 2016 · 11 This question already has answers here: Python dictionary changes when using intermediate variable (2 answers) How to copy a dictionary and only edit the copy (23 answers)

Sep 10, 2011 · You are close. Try: dict.fromkeys(my_csv_dict.keys(),[]) This will initialize a dictionary with the same keys that you parsed from your CSV file, and each one will map to an empty list (to …

In library, you may need to mutate a copy of some dict-like object, and you want a copy that is the same object. Other APIs must have an actual dict, so would create a new dict with the constructor method …