[FIXED] pandas dataframe index: to_list() vs tolist()

Issue

I recently wrote a python script for someone, where I converted a pandas dataframe's index into a list using to_list(). However, this does not work for them, as they get: AttributeError: 'Index' object has no attribute 'to_list' with their python interpretter.

I did some searching and found that there is also tolist() that seems to do the same as to_list(): searching on Pandas documentation finds both, with word-for-word identical description. On the other hand, the documentation of Index mentions only to_list().

So I wonder whether there is a difference between the two

• in functionality
• in popularity and/or "officiality"/endorsement
• in support in different version of pandas

Solution

If you check the source code, you will see that right after tolist() code there is line to_list = tolist, so to_list is just alias for tolist

EDIT: to_list() was added in ver. 0.24.0, see issue#8826

Answered By - buran