python - => 在谷歌 Python 示例中

Question

所以我是 Python 新手，正在尝试通过 Google Python 在线类(class)学习 [ https://developers.google.com/edu/python/regular-expressions]

我正在运行 Python 2.7.5，当我尝试这个例子时，=> 有问题。

我尝试在谷歌上搜索解释，但一无所获。任何帮助将不胜感激。

错误信息如下。

sandbox$./re-test.py 
  File "./re-test.py", line 8
    match = re.search(r'iii', 'piiig') =>  found, match.group() == "iii"
                                        ^

程序代码是:

#!/usr/bin/python

import re

## Search for pattern 'iii' in string 'piiig'.
## All of the pattern must match, but it may appear anywhere.
## On success, match.group() is matched text.
match = re.search(r'iii', 'piiig') =>  found, match.group() == "iii"
match = re.search(r'igs', 'piiig') =>  not found, match == None

## . = any char but \n
match = re.search(r'..g', 'piiig') =>  found, match.group() == "iig"

## \d = digit char, \w = word char
match = re.search(r'\d\d\d', 'p123g') =>  found, match.group() == "123"
match = re.search(r'\w\w\w', '@@abcd!!') =>  found, match.group() == "abc"

Answer 1

作者使用=>来描述结果；它不是 Python 语法的一部分。

考虑写成下面这样，其意图可能更清楚:

match = re.search(r'iii', 'piiig')  #=> found, match.group() == "iii"