Python “方法”对象不可下标。不知道怎么回事
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'method' object is not subscriptable. Don't know what's wrong
提问by Ecoturtle
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.
我正在编写一些代码来创建一个未排序的列表，但是每当我尝试使用 insert 方法插入一个列表时，我都会收到“方法”对象不可下标的错误。不知道如何修复它。谢谢。
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]
回答by zondo
You need to use parentheses: myList.insert([1, 2, 3]). When you leave out the parentheses, python thinks you are trying to access myList.insertat position 1, 2, 3, because that's what brackets are used for when they are right next to a variable.
您需要使用括号：myList.insert([1, 2, 3]). 当您省略括号时，python 认为您正在尝试访问myList.insertposition 1, 2, 3，因为这就是括号在变量旁边时的用途。
