[Python] merge sorted array wrong result not sure why? [duplicate]

I am doing this challenge but I am getting two different results one on my pycharm and one on the leet code webpage.

my code on pycharm:

nums1 = [1,2,3,0,0,0]
m = 3
nums2 = [2,5,6]
n = 3
print(nums1[0:m])
print(nums2[0:n])
nums1 = nums1[0:m] + nums2[0:n]


nums1.sort()
print(nums1)


and the result:

[1, 2, 3]
[2, 5, 6]
[1, 2, 2, 3, 5, 6]


my leet code:

class Solution:
def merge(self, nums1: List[int], m: int, nums2: List[int], n: int) -> None:
"""
Do not return anything, modify nums1 in-place instead.
"""
nums1=nums1[0:m]+nums2[0:n]
nums1.sort()


the leet code result:

Input
nums1 = [1,2,3,0,0,0]
m = 3
nums2 = [2,5,6]
n = 3
Output
[1,2,3,0,0,0]
Expected
[1,2,2,3,5,6]


Both are python 3.

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