Variables In Input Questions

So, I know that if you do:

variable1 = 10

variable2 = variable1

then variable2 will be 10. But if you do:

variable1 = 10

and then ask for an input:

variable2 = input("...")

and type variable1 as the input, then variable2 will be 'variable1' instead of 10. How can I change this so that variable2 equals variable1 after inputting the string variable1?

If you're sure that you really want to do this, you can use eval, but this is a bad practice, and leaves you susceptible to arbitrary code injection.

>>> variable1 = 10
>>> variable2 = eval(input())
variable1
>>> variable2
10

A slightly better approach might be to use the globals or locals builtins, but this is still a bad practice.

>>> variable2 = globals()[input()]
variable1
>>> variable2
10