I'm making a small program for math (no particular reason, just kind of wanted to) and I ran into the error "TypeError: 'NoneType' object is not subscribable.
I have never before seen this error, so I have no idea what it means.
import math print("The format you should consider:") print str("value 1a")+str(" + ")+str("value 2")+str(" = ")+str("value 3a ")+str("value 4")+str("\n") print("Do not include the letters in the input, it automatically adds them") v1 = input("Value 1: ") v2 = input("Value 2: ") v3 = input("Value 3: ") v4 = input("Value 4: ") lista = [v1, v3] lista = list.sort(lista) a = lista[1] - lista[0] list = [v2, v4] list = list.sort(list) b = list[1] = list[0] print str(a)+str("a")+str(" = ")+str(b)
Traceback (most recent call last): File "C:/Users/Nathan/Documents/Python/New thing", line 16, in <module>
a = lista[1] - lista[0]
TypeError: 'NoneType' object is not subscriptable
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