AttributeError：“ builtin_function_or_method”对象没有属性“ pop”

Question

Here is my code

def allButMax():
    input_list=[]
    user_input = 0
    num_sum = 0
    max_num = 0

    while user_input != "end":
        input_list.append(float(user_input))
        user_input = input("Enter next number: ")


    input_list = input_list[1:]

    input_list = input_list.sort


    input_listnew = input_list.pop(-1)


    for num in input_list:
     num_sum = num_sum + num

    print("The num of all values except for the maximum value is: ", num_sum)

When I run the program, it says

AttributeError: 'builtin_function_or_method' object has no attribute 'pop'

This program computes the sum of all the values entered except for the maximum value in the series

I do not know where I went wrong

Answer 1

The problem is on this line

input_list = input_list.sort

input_list.sort is not actually being called. You are just storing a reference to the function in input_list and consequently nuking the list.

sort is an inplace method, it operates on the list itself, rather than returning a new sorted copy of the list (see sorted ). It returns None therefore you should not try to assign from its return value.

replace

input_list = input_list.sort

with

input_list.sort()