Operators within strings

[Dodle]

I have a list:

Cmem = ["10", "-", "5"]

How can I extract Cmem[1] and change it from a string to a literal operator?

I know that with numbers I can use either int(Cmem[1]) or float(Cmem[1]).

Full Code:

# wxCalc v0.0.0.3 console

opers = ("+", "-", "*", "/")
Cmem = ["10", "-", "5"]

def eval_it(Cmem):
	for O in opers:
		if O in Cmem:
			m1 = Cmem.index(O)-1
			a1 = Cmem.index(O)+1
			val1 = Cmem[m1]
			val2 = Cmem[a1]
			answer = val1 O val2
			print answer

eval_it(Cmem)

[ɹəuəllıʍ ʇɐb]

I don't think that any compiler can understand that. I think this is something that would need to be done in a precompiler run. As long as your strings are constants only, it will work; it will not work if the values are supplied at run time.

Or, you would need to create a function that does things according to the operator value, e.g. with some sort of Select / Case statement (I don't know if python has such an operation).