Count number of occurrences of a substring in a string

by

string.count(substring), like in:

>>> "abcdabcva".count("ab")
2

Update:

As pointed up in the comments, this is the way to do it for non overlapping occurrences. If you need to count overlapping occurrences, you’d better check the answers at: “Python regex find all overlapping matches?“, or just check my other answer below.

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