regex - Regexp for multiple line C macro in Python -

i trying delete macros c headers have problem deleting multiple line macros. example

#define macro(char)  \ //macro still continues \ //macro still continues \ 

this regexp deleting one-line macros not quite sure how include \n in regular expression.

text=re.sub('#([\w\w\s\d])*?\n', '', text, re.s) 

text=re.sub('#([\w\w\s\d])*?(\n.*?\\\\)*\n', '', text, re.s | re.m) 

should trick

edit: fix @blackie123