How can I use if loop to grep a word from txt file using python?

Question

I am currently using if "not" or "missing" in temp_reader:

However, it looks like it is not working. It always go inside of the if loop even if not or missing is not there.

How can I fix this, so that it only foes inside of the loop if a text file contains not or missing?

Please add some code that showcases your problem – Fredrik Pihl Apr 13 '15 at 17:38 — Fredrik Pihl, Apr 13 '15 at 17:38
what is the type of `temp_reader`? – Cristian Lupascu Apr 13 '15 at 17:44 — Cristian Lupascu, Apr 13 '15 at 17:44

score 2 · Accepted Answer · answered Apr 13 '15 at 17:38

Change to something like this:

if "not" in temp_reader or "missing" in temp_reader:

The original condition was being parsed like this:

if ("not") or ("missing" in temp_reader):

Since "not" always evaluates to True, the branch was being taken every time.

1 Answers1