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用Python操作字符串之rindex()方法的使用

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Release： 2016-06-10 15:12:14
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 rindex()方法返回所在的子str被找到的最后一个索引，可选择限制搜索的字符串string[beg:end] 如果没有这样的索引存在，抛出一个异常。
语法

以下是rindex()方法的语法：

str.rindex(str, beg=0 end=len(string))
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参数

  • str -- 此选项指定要搜索的字符串。
  • beg -- 这是开始索引，默认情况下为 0
  • len -- 这是最后的索引，默认情况下它等于字符串的长度。

返回值

此方法如果找到返回最后一个索引，否则如果没有找到str引发一个异常。
例子

下面的例子显示了rindex()方法的使用。

#!/usr/bin/python

str1 = "this is string example....wow!!!";
str2 = "is";

print str1.rindex(str2);
print str1.index(str2);
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当我们运行上面的程序，它会产生以下结果：

5
2
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Related labels：
python
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