1、long_text.count('the')，查看在long_text字符串中，有多少個the ``` long_text = "the is the is" print long_text.count('the') ``` 2、long_text.find('the')，查看long_text字符串中第一個the出現的位置 ``` long_text = 'aaa the is the is' print long_text.find('the') ``` 3、replace()，文本替換![] ``` long_text = 'this is ugly' print long_text.replace('ugly','meh') ```