How does python calculate the number of times

This article mainly explains "how to calculate the number of times by python". Friends who are interested may wish to take a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn "how python calculates the number of times".

The details are as follows:

Count () syntax

Str.count (sub, start= 0 (string))

Parameter description:

Sub: substring for search

Start: the position where the string starts the search. The default is the first character, and the index value of the first character is 0.

End: the position in the string where the search ends. The index of the first character in the character is 0, and the default is the last position of the string.

Example:

#! / usr/bin/python

# www.xieniao.com

Str = "this is string example.wowning examples!"

Sub = "I"

Print "str.count (sub, 4,40):", str.count (sub, 4,40)

Sub = "wow"

Print "str.count (sub):", str.count (sub)

Output result:

Str.count (sub, 4,40): 2

Str.count (sub): 1

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