单行上的python正则表达式语句

Question

我有一个正则表达式，但我想在不影响输出的情况下将它们变成单个表达式。下面的代码保存文本中的单词列表并保存到列表中。

import re
a=[]
with open('qwert.txt', 'r') as f:
    for line in f:
        res = re.findall(r'(?:Prof[.](\w+))', line)
        if res: 
            a.extend(res)
        res = re.findall(r'(?:As (\w+))', line)
        if res:
            a.extend(res)
        res = re.findall(r'\w+(?==\w)', line)
        if res:
            a.extend(res)

print a

qwert.txt

As every
prof.John and Prof.Keel and goodthing=him
Prof.Tensa
Keel a good person As kim
kim is fine
Prof.Jees
As John winning Nobel prize
As Mary wins all prize
sa for ask
car

he=is good

输出:

['every', 'Keel', 'goodthing', 'Tensa', 'kim', 'Jees', 'John', 'Mary', 'he']

如何将三个正则表达式语句放到一行中？

Answer 1

您可以使用运算符“|”，它可以让您找到一个或另一个表达式。 res = re.findall(r'(?:Prof[.](\w+))|(?:As (\w+))|(?:\w+(?==\w))', 行)