python实现给定一个数和数组，求数组

def twoSum(self, nums, target):

nums_bak = nums.copy()

nums.sort()

i = 0

j = 0

for k in range(0, (len(nums) - 1)):

if nums[k] + nums[k + 1] >= target:

i = k

j = k + 1

break

while i >= 0 and j < len(nums):

if nums[i] + nums[j] < target:

j += 1

elif nums[i] + nums[j] > target:

i -= 1

else:

if nums[i] == nums[j]:

return [nums_bak.index(nums[i]), nums_bak.index(nums[j], i + 1)]

else:

return [nums_bak.index(nums[i]), nums_bak.index(nums[j])]