Please help me why the String.count() incorrect? [Python 3.x]

Question

I have an exercise that find how many time a sub string appear in a main string.

2 inputs are main string and sub string.

I used string.count() but with the main string "abcdcdc" and sub string "cdc", the result only 1 why you can see the sub string "cdc" appeared twice time "abcdcdc" & "abcdcdc".

So that I would like to know why my code provided incorrect result. Does the string.count() on calculate one time for each apperance? Hereunder is my code:

 strs=str(input())
 sub_str=str(input())

print(strs.count(sub_str))

Thank you very much.

[str.count](https://docs.python.org/3/library/stdtypes.html#str.count) — "Return the number of **non-overlapping** occurrences" — khelwood, Mar 18 '19 at 13:55

score 0 · Answer 1 · answered Mar 18 '19 at 13:57

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Please see How String.count() works?

count() only counts non-overlapping substrings.

answered Mar 18 '19 at 13:57

Clay

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score 0 · Answer 2 · answered Mar 18 '19 at 13:57

0

From the documentation here: str.count

Return the number of non-overlapping occurrences of substring

The two occurrences in your example overlap. The number of non-overlapping occurrences is one.

answered Mar 18 '19 at 13:57

khelwood

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Please help me why the String.count() incorrect? [Python 3.x]

2 Answers2