用@和空格解析python字符串

Question

当用户在字符串中写入@表达式时，我想解析所有用户名。

示例：

I want to tell @susan and @rick that I love you all.

我想从字符串中获取['susan', 'rick']，如何编写解析表达式？

Answer 1

为此编写表达式并不是很难。

>>> import re
>>> re.findall(r'@(\S+)', ' I want to tell @susan and @rick that I love you all')
['susan', 'rick']

或使用匹配任何单词字符的\w。

>>> re.findall(r'@(\w+)', ' I want to tell @susan and @rick that I love you all')
['susan', 'rick']

Answer 2

>>> import re
>>> s = "I want to tell @susan and @rick that I love you all."
>>> m = re.findall(r'@[a-z]+', s)
>>> m
['@susan', '@rick']
>>> 

Answer 3

import re

# input string
myStr = "tell @susan and @rick that"

# match
names = re.findall(r"@(\w+)", myStr)

Answer 4

使用正则表达式的答案也很有效。对于多样性，这里有一个列表comp。

>>> s = 'I want to tell @susan and @rick that I love you all.'    
>>> [i.strip('@') for i in s.split() if '@' in i]
['susan', 'rick']