How to convert upper case letters to lower case [duplicate]

Question

I have a script which reads the input and than lists it, however i want it to convert upper case letters to lower case, how can i do that?

this is what i got

 for words in text.readlines():     sentence = [w.strip(',.') for w in line.split() if w.strip(',.')]     list.append(sentence) 

Answer 1

You can find more methods and functions related to Python strings in section 5.6.1. String Methods of the documentation.

w.strip(',.').lower() 

Answer 2

str.lower() converts all cased characters to lowercase.