How do I split a word into 2 words in Python?

Example:
I am trying to split a list of column names called "startedat", "duecheck", "vehicleid" into "started" and "at", "due" and "check", "vehicle" and "id" respectively to get the desired output like started_at, due_check, vehicle_id.

I have tried using nltk word tokenize to split but it does not work. May I know what other methods I can do?

Thank you.

>Solution :

Install package

pip install wordninja

Code :

import wordninja

col_list = ["startedat", "duecheck", "vehicleid"]

result = ["_".join(wordninja.split(x)) for x in col_list]
print(result)