[Python] How to keep a '+' function like a math operator when it is contained in a variable...

sum1=0
while True:

input1 = (input('Please enter a number '))
input2 = (input('Please input operator '))
if not(input1=='end')or not(input2=='end'):
input1=float(input1)
#I need it to perform a math operation
#example: some variable (num) then a variable (math operator) and a second variable (num)
sum1= (sum1 input2 input3) # does not work

print(sum1)


I want the operator to work but I don't know the necessary data type/built-in function. I tried using f strings and then converting back to float but it sticks it together example: str 5.0 + 6.0 cannot be converted to float.

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