Regular Expression Unicode string patterns

unicodestring.py

#codersarts 
#unicode string patterns in regular expression

\d :  Matches any decimal digit; this is equivalent to the class [0-9]. 
\D :  Matches any non-digit character; this is equivalent to the class [^0-9] 
\s :  Matches any whitespace character; this is equivalent to the class [ \t\n\r\f\v]. 
\S : Matches any non-whitespace character; this is equivalent to the class [^    \t\n\r\f\v]. 

\w :  Matches any alphanumeric character; this is equivalent to the class [a-zA-Z0-9_]. 
\W :  Matches any non-alphanumeric character; this is equivalent to the class [^a-zA-Z0-9_].