My .exe made using Python being detected as a virus

[Larz60+]

you can simplify charGen:

def charGen(x):
    ret="banana"
    if x > 0 and x < len(ret)+1:
        return ret[x-1]

print(charGen(5))
print(charGen(2))
print(charGen(7))
print(charGen(0))

Output:
n
a
None
None