try catch question ,get data from main code

[korenron]

Hello
I want to learn and understand what am I doing wrong
I wrote a simple code that use try - catch

import time

i = 0
How_Many_False = 0


def test():
    print("number i is : %3.2f  " % i)
    print(f"result is : {i / 10:3.3f}")

    if i > 5:
        try:
            temp = i / 0
            print(temp)

        except Exception as e:
            print(e)
            print(How_Many_False)
            How_Many_False += 1

    print("false times is : " % How_Many_False)


while 1:
    i = (i + 1)
    test()
    time.sleep(1)

but when I try to run it I get error - in the "catch" section
when I open the code in PyCharm I see this error

Unresolved reference 'How_Many_False'

why ?
the code is meant to fail on 5
this is just so I can understand the links between the variables on the code

Thanks ,