[Python] How to change a global variable from a function in place? [duplicate]

I want to change a variable from a function like this:

def addone(x):
#Some code
inp = 5
addone(inp)
print(inp)
#Prints 6


I tried this:

def addone(x):
x += 1


The variable only changes inside the function though, and the value outside did not change.

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