详解Python中find()方法的使用
find()方法判断字符串str，如果起始索引beg和结束end索引能找到在字符串或字符串的一个子串中。
语法
以下是find()方法的语法：
str.find(str, beg=0 end=len(string))
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。
- end -- 这是结束索引，默认情况下它等于字符串的长度。
返回值
如果找到此方法返回的索引，否则返回-1。
例子
下面的例子显示了find()方法的使用。
#!/usr/bin/python str1 = "this is string example....wow!!!"; str2 = "exam"; print str1.find(str2); print str1.find(str2, 10); print str1.find(str2, 40);
当我们运行上面的程序，它会产生以下结果：
15 15 -1
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