在python re.findall中使用多个标志

Question

我想在re.findall函数中使用多个标志.更具体地说,我想同时使用IGNORECASE和DOTALL标志.

x = re.findall(r'CAT.+?END', 'Cat \n eND', (re.I, re.DOTALL))

错误:

Traceback (most recent call last):
  File "<pyshell#78>", line 1, in <module>
    x = re.findall(r'CAT.+?END','Cat \n eND',(re.I,re.DOTALL))
  File "C:\Python27\lib\re.py", line 177, in findall
    return _compile(pattern, flags).findall(string)
  File "C:\Python27\lib\re.py", line 243, in _compile
    p = sre_compile.compile(pattern, flags)
  File "C:\Python27\lib\sre_compile.py", line 500, in compile
    p = sre_parse.parse(p, flags)
  File "C:\Python27\lib\sre_parse.py", line 673, in parse
    p = _parse_sub(source, pattern, 0)
  File "C:\Python27\lib\sre_parse.py", line 308, in _parse_sub
    itemsappend(_parse(source, state))
  File "C:\Python27\lib\sre_parse.py", line 401, in _parse
    if state.flags & SRE_FLAG_VERBOSE:
TypeError: unsupported operand type(s) for &: 'tuple' and 'int'

有没有办法使用多个标志？

Answer 1

是的,但你必须将它们组合在一起:

x = re.findall(r'CAT.+?END','Cat \n eND',re.I | re.DOTALL)

Answer 2

有没有办法使用多个标志？

它没有被提及,但您也可以使用内联(?...)修饰符.

x = re.findall(r'(?si)CAT.+?END', 'Cat \n eND')

Answer 3

你不能把标志放在元组中.在标志中使用管道符(OR操作数):

x = re.findall(r'CAT.+?END','Cat \n eND',flags=re.I | re.DOTALL)