[python] 'method' object is not subscriptable. Don't know what's wrong

I'm writing some code to create an unsorted list but whenever I try to insert a list using the insert method I get the 'method' object is not subscriptable error. Not sure how to fix it. Thanks.

class UnsortedList:
    def __init__(self):
        self.theList = list()
    def __getitem__(self, i):
       print(self.theList[i])
    def insert(self, lst):
        for x in lst:
            try:
                self.theList.append(float(x))
            except:
                print("oops")


myList = UnsortedList()
myList.insert[1, 2, 3]

You need to use parentheses: myList.insert([1, 2, 3]). When you leave out the parentheses, python thinks you are trying to access myList.insert at position 1, 2, 3, because that's what brackets are used for when they are right next to a variable.