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 =          


        

Answer 1

As everyone else has mentioned it is better to use the "in" operator, it can also act on lists:

line = "This,is,a,sample,string"
lst = ['This', 'sample']
for i in lst:
     i in line

>> True
>> True