Pyhton: eval(), exec() or another function?

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Pyhton: eval(), exec() or another function?



I have a problem. What should I use? Here's the code:


import example

a = 1
b = "+"
c = 3
g = example.Calc(a, b, c)
result = example.Calc.f
print(f"The result is result")



example.py:


class Calc:
f = None
def __init__(self, a, b, c):
eval(f"d = a b c")
Calc.f = d



It should print "The result is 4", but instead it gives this error:


Traceback (most recent call last):
File "C:(Path to script)example.py", line 4, in __init__
eval(f"d = a b c")
File "<string>", line 1
d = a - c
^
SyntaxError: invalid syntax









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