Python match a string with regex

Question

I need a python regular expression to check if a word is present in a string. The string is separated by commas, potentially.

So for example,

line = 'This,is,a,sample,string' 

I want to search based on "sample", this would return true. I am crappy with reg ex, so when I looked at the python docs, I saw something like

import re re.match(r'sample', line) 

But I don't know why there was an 'r' before the text to be matched. Can someone help me with the regular expression?

Answer 1

Are you sure you need a regex? It seems that you only need to know if a word is present in a string, so you can do:

>>> line = 'This,is,a,sample,string' >>> "sample" in line  True