def twonums(nums,target):
    hashmap=dict()
    for i in range(len(nums)):
        if hashmap.get(target-nums[i]) is  None:
             hashmap[nums[i]]=i
            
        else:
            return  [hashmap.get(target-nums[i]),i]
    
if __name__=='__main__':
    nums=[4,3,7,9]
    n=twonums(nums,11)

    print(n)