정규 표현 식 패턴 문법

.                          (   DOTALL        )
^                      (  MULTILINE，        )
$                      (  MULTILINE，        )
*                 0                   ，    (       )
+                 1                   ，    
?                 0  1               ，    
*? , +?, ??            *, +,   ? (       )
{m,n}              m   n                ，    
{m,n}?             m   n                ，     
[...]                              
|                   
(...)                    ，      
(?iLmsux)                  ，     
(?:...)            (...),         
(?P<id>...)        (...),           id,           
(?P=id)             id      
(?#...)                    ，     
(?=...)         Lookahead assertion; matches if regular expression ... matches what comes next, but does not consume any part of the string
(?!...)         Negative lookahead assertion; matches if regular expression ... does not match what comes next, and does not consume any part of the string
(?<=...)        Lookbehind assertion; matches if there is a match for regular expression ... ending at the current position (... must match a fixed length)
(?<!...)        Negative lookbehind assertion; matches if there is no match for regular expression ... ending at the current position (... must match a fixed length)

umber                  (    ,    1-99  )
\A                     
\b                    
\B                    (     )
\d                    
\D                     
\s                      
\S                      
\w                    
\W                     
\Z                     
\\