TypeError: 'builtin_function_or_method' object is not subscriptable

Question

elif( listb[0] == \"-test\"):
    run_all.set(\"testview\")
    listb.pop[0]

ERROR: Exception in Tkinter callback T

Answer 1

This error arises when you don't use brackets with pop operation. Write the code in this manner.

listb.pop(0)

This is a valid python expression.

Answer 2

Looks like you typed brackets instead of parenthesis by mistake.

Answer 3

instead of writing listb.pop[0] write

listb.pop()[0]
         ^
         |

Answer 4

Mad a similar error, easy to fix:

    TypeError Traceback (most recent call last) <ipython-input-2-1eb12bfdc7db> in <module>
  3 mylist = [10,20,30] ----> 4 arr = np.array[(10,20,30)] 5 d = {'a':10, 'b':20, 'c':30} TypeError: 'builtin_function_or_method' object is not subscriptable

but I should have written it as:

arr = np.array([10,20,30])

Very fixable, rookie/dumb mistake.

Answer 5

I think you want

listb.pop()[0]

The expression listb.pop is a valid python expression which results in a reference to the pop method, but doesn't actually call that method. You need to add the open and close parentheses to call the method.

Answer 6

You are trying to access pop as if was a list or a tupple, but pop is not. It's a method.