I want transform "a=2+3" to a=2+3.

Question

Or just "2+3" to 2+3

Answer 1

I think you want an expression evaluator [that took me a few seconds to figure out so please excuse me if I missed].

http://pyparsing.wikispaces.com/

from source (and most highly-rated answer):
http://stackoverflow.com/questions/2371436/evaluating-a-mathematical-expression-in-a-string

and here, using compiler.parse():
http://stackoverflow.com/questions/594266/equation-parsing-in-JUMP_LINK__&&__python__&&__JUMP_LINK

Answer 2

Thank you 👍