RE replace problem too

[oyster]

in my case, I want to replace all the function name with '', that is
sin(1) -> (1)
sin(pi*(2+4)) -> (pi*(2+4))
how can I use RE in this situation? thanx

 

[Lie Ryan]

in my case, I want to replace all the function name with '', that is
sin(1) -> (1)
sin(pi*(2+4)) -> (pi*(2+4))
how can I use RE in this situation? thanx

this works if there is no implicit multiplication:

re.sub('\w+\(', '(', 'sin(pi*(2+4))')

this one might be more robust:
re.sub('[a-zA-Z]\w*\s*\(', '(', 'sin(pi*cos(2+4))')