
python - How do I clone a list so that it doesn't change unexpectedly ...
4150 new_list = my_list doesn't actually create a second list. The assignment just copies the reference to the list, not the actual list, so both new_list and my_list refer to the same list after the assignment. …
python - How to copy a dictionary and only edit the copy - Stack …
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, …
How can I create a copy of an object in Python? - Stack Overflow
Jan 25, 2011 · To get a fully independent copy of an object you can use the copy.deepcopy() function. For more details about shallow and deep copying please refer to the other answers to this question …
python - What is the difference between shallow copy, deepcopy and ...
May 6, 2017 · Below code demonstrates the difference between assignment, shallow copy using the copy method, shallow copy using the (slice) [:] and the deepcopy. Below example uses nested lists …
python when to use copy.copy - Stack Overflow
Aug 12, 2011 · copy.copy doesn't change this at all. If you want to propagate changes even for numbers or strings - here does the immutability show - you have to wrap the numbers and strings in a another …
python - How to deep copy a list? - Stack Overflow
import copy copy.copy() copy.deepcopy() copy() is a shallow copy function. If the given argument is a compound data structure, for instance a list, then Python will create another object of the same type …
How to override the copy/deepcopy operations for a Python object ...
The latter is called to implement the deep copy operation; it is passed one argument, the memo dictionary. If the __deepcopy__() implementation needs to make a deep copy of a component, it …
python - Best practice to implement copy method in a class? - Stack ...
Jul 14, 2017 · The documentation states: In order for a class to define its own copy implementation, it can define special methods __copy__() and __deepcopy__(). The former is called to implement the …
shutil - How do I copy an entire directory of files into an existing ...
How do I copy an entire directory of files into an existing directory using Python? Asked 16 years, 2 months ago Modified 10 months ago Viewed 632k times
Copy multiple files in Python - Stack Overflow
Nov 27, 2018 · How to copy all the files present in one directory to another directory using Python. I have the source path and the destination path as string.