Avoid copying element multiple times in sub-lists
1607
List of lists changes reflected across sublists unexpectedly
21205
Select/Delete with Sublist elements?
32491
How to skip an \item in sub-enumerate level
149172
Java: Avoid inserting duplicate in arraylist
62998
How to match multiple copies of a value?
76332
How to avoid duplicating assigned materials when duplicating a mesh?
1735
Directly modifying List elements
117424
Simple way to find if two different lists contain exactly the same elements?
130346
How do I delete all items that occur more than once?
43262
Storing arrays in Set and avoiding duplicates
9108
How to remove items from a list while iterating?
97657
why can't I change only a single element in a nested list in Python
66211
Removing elements that have consecutive duplicates
129503
Can't modify list elements in a loop
47345
Threading elements over corresponding elements in the second list
73916
Common elements in two lists
20352
Why does foo.append(bar) affect all elements in a list of lists?