Why am I receiving this error when I run this code?
Traceback (most recent call last):
File "main.py", line 13, in <module>
def twoSum(self, nums: list[int], target: int) -> list[int]:
TypeError: 'type' object is not subscriptable
nums = [4,5,6,7,8,9]
target = 13
def twoSum(self, nums: list[int], target: int) -> list[int]:
dictionary = {}
answer = []
for i in range(len(nums)):
secondNumber = target-nums[i]
if(secondNumber in dictionary.keys()):
secondIndex = nums.index(secondNumber)
if(i != secondIndex):
return sorted([i, secondIndex])
dictionary.update({nums[i]: i})
print(twoSum(nums, target))
The following answer only applies to Python < 3.9
The expression list[int] is attempting to subscript the object list, which is a class. Class objects are of the type of their metaclass, which is type in this case. Since type does not define a __getitem__ method, you can't do list[...].
To do this correctly, you need to import typing.List and use that instead of the built-in list in your type hints:
from typing import List
...
def twoSum(self, nums: List[int], target: int) -> List[int]:
If you want to avoid the extra import, you can simplify the type hints to exclude generics:
def twoSum(self, nums: list, target: int) -> list:
Alternatively, you can get rid of type hinting completely:
def twoSum(self, nums, target):