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This article mainly explains "python how to detect whether a string contains a string". The explanation in the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "python how to detect whether a string contains a string".

Index () syntax

Str.index (str, beg=0, end=len (string))

Parameter description:

Str: specifies the string to retrieve

Beg: start indexing. Default is 0.

End: ends the index, which defaults to the length of the string.

Examples of use:

#! / usr/bin/python

Str1 = "this is string example.wowning examples!"

Str2 = "exam"

Print str1.index (str2)

Print str1.index (str2, 10)

Print str1.index (str2, 40)

Return the result:

fifteen

fifteen

Traceback (most recent call last):

File "test.py", line 8, in

Print str1.index (str2, 40)

ValueError: substring not found

Shell returned 1

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