class Solution:
def searchRange(self, nums: List[int], target: int) -> List[int]:
# if target>nums[-1] or target<nums[0]:
# return [-1,-1]
#ans=[]
left=None
right=None
for i,v in enumerate(nums):
if left==None and v==target:
left=i
elif left!=None and v==target:
right=i
else:
continue
if left==None:
left=right=-1
elif not right and left>=0:
right=left
return [left,right]