How to convert upper case letters to lower case

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)

if you found the `strip` and `split` methods of `str`, how hard can it be to search for `upper` and `lower`? — JBernardo, Oct 22 '11 at 19:24
please type these things into google before coming here, python docs is hit 1 and has the correct answer. For the record the answer is `thestring.lower()` — Serdalis, Oct 22 '11 at 19:25

score 133 · Answer 1 · edited Oct 22 '11 at 19:29

133

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

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

edited Oct 22 '11 at 19:29

answered Oct 22 '11 at 19:23

Ehtesh Choudhury

score 29 · Answer 2 · answered Oct 22 '11 at 19:24

29

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

answered Oct 22 '11 at 19:24

Dennis

score 5 · Answer 3 · answered Oct 22 '11 at 19:27

5

To convert a string to lower case in Python, use something like this.

list.append(sentence.lower())

I found this in the first result after searching for "python upper to lower case".

answered Oct 22 '11 at 19:27

orangething

3 Answers3