Python3 rfind() Method

Python3 字符串Python3 Strings


Description

Python rfind() returns the position of the last occurrence of the string, or -1 if there is no match.

Syntax

Syntax of the rfind() method:

str.rfind(str, beg=0, end=len(string))

Parameters

  • str -- The string to search for
  • beg -- The starting position of the search, default is 0
  • end -- The ending position of the search, default is the length of the string.

Return Value

Returns the position of the last occurrence of the string, or -1 if there is no match.

Example

The following example demonstrates how to use the rfind() function:

Example

#!/usr/bin/python3

str1 = "this is really a string example....wow!!!"
str2 = "is"

print (str1.rfind(str2))

print (str1.rfind(str2, 0, 10))
print (str1.rfind(str2, 10, 0))

print (str1.find(str2))
print (str1.find(str2, 0, 10))
print (str1.find(str2, 10, 0))

The output of the above example is as follows:

5
5
-1
2
2
-1

Python3 字符串Python3 Strings

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