正则表达式:匹配到(aa | bb)(cc)？

Question

我的正则表达式需要能够找到字符串:

1. Visual Studio 2008
2. Visual Studio Express 2008
3. Visual Basic 2008
4. Visual Basic Express 2008
5. Visual C++ 2008
6. Visual C++ Express 2008

和许多其他类似的变体,用这一个单独的字符串替换

Visual Studio 2005

我试过"Visual(Basic | C++ | Studio)(Express)？2008",但它不起作用.有任何想法吗？

编辑:现在我尝试了"Visual(Basic)|(C++)|(Studio)(Express)？2008",但是替换后的行变为"Visual Studio 2005 Express 2008",用于输入"Visual Basic Express 2008".

Answer 1

它应该是

"Visual (Basic|C\+\+|Studio)( Express)? 2008"

>>> import re
>>> repl = 'Visual Studio 2005'
>>> regexp = re.compile('Visual (Studio|Basic|C\+\+)( Express)? 2008')
>>> test1 = 'Visual Studio 2008'
>>> test2 = 'Visual Studio Express 2008'
>>> test3 = 'Visual C++ Express 2008'
>>> test4 = 'Visual C++ Express 1008'
>>> re.sub(regexp,repl,test1)
'Visual Studio 2005'
>>> re.sub(regexp,repl,test2)
'Visual Studio 2005'
>>> re.sub(regexp,repl,test3)
'Visual Studio 2005'
>>> re.sub(regexp,repl,test4)
'Visual C++ Express 1008'