Counting the occurrences of a substring in a string python

Question

In my program I'm using count=strr2.lower().count("ieee") to calculate the number of occurrences in the following string,

"i love ieee and ieeextream is the best coding competition ever"

In here it counts "ieeextream" is also as one occurrence which is not my expected result. The expected output is count=1

So are there any method to check only for "ieee" word or can we change the same code with different implementation? Thanks for your time

Its working as expected. `ieeextream` also contains `ieee`. Hence its counted. — Mayank Porwal, Oct 24 '20 at 13:10
`which is not my expected result` Why? Are you trying to check how many times `'ieee'` word appears, not as substring? — Arkistarvh Kltzuonstev, Oct 24 '20 at 13:10
Hello @Mayank, but I'm expecting only ieee as one occurrence. so are there any method to get my expected output — INDRAJITH EKANAYAKE, Oct 24 '20 at 13:11
What is the expected count for `aa` in `aaa`? 0, 1, or 2 times? — tobias_k, Oct 24 '20 at 13:16

score 3 · Accepted Answer · answered Oct 24 '20 at 13:19

3

If you are trying to find the sub-string as a whole word present in the original string, then I guess, this is what you need :

count=strr2.lower().split().count("ieee")

answered Oct 24 '20 at 13:19

Arkistarvh Kltzuonstev

6,824
7
26
56

score 1 · Answer 2 · answered Oct 24 '20 at 13:20

If you want to count only whole words, you can use a regular expression, wrapping the word to be found in word-boundary characters \b. This will also work if the word is surrounded by punctuation.

>>> import re
>>> s = "i love IEEE, and ieeextream is the best coding competition ever"
>>> len(re.findall(r"\bieee\b", s.lower()))
1

Counting the occurrences of a substring in a string python

2 Answers2