How to put a calculation in a variable

Question

hello, I wanted to do a program, who ask two calculation with an unknown. But I met à big problem : I can't change the calculation into an int, because the input change it in a string, and can change, for exemple, '3*i+4' and '6*6' in int. Can you help me please ?

Answer 1

If your ‘i’ is the imaginary unit, look at math modules like numpy or sympy.

If you want to input an expression (like in a calculator), you can make one yourself. (Or use sympy’s expressions and solve them for your variable.)

If you choose to make your own calculator, here’s the idea:

https://www.sololearn.com/learn/704/

Answer 2

ghali lawal I think you are exec() function is used for evaluation of the string in python.
https://www.sololearn.com/learn/903/?ref=app

Answer 3

Just use type casting.
input = int(input("Enter"))

Answer 4

Please show your code then.

Answer 5

why not use he eval method
the start is just

calculation = eval(input("Enter a calculation"))

Answer 6

yes but there is the problem : it doesn't work

Answer 7

the start is just

calculation = int(input("Enter a calculation"))

and it raise an error if I put a calculation : invalid interal for int()
with base 10: '4+5*x'

Answer 8

ok thank you, I think it's the easiest way to do that :)

Answer 9

The input still a str, I can't eval it

Answer 10

thank you :D