import timeit

setup = '''
arr = [1,5,7,8]
target, table = 9, {}
'''
my_code = '''
def two_sums(arr, target):
  for i, _ in enumerate(arr):
    for j in range(i+1, len(arr)):
      if ((arr[i] + arr[j]) == target):
        return [i, j]
        break
  return
'''
print("time in seconds: ",timeit.timeit(setup = setup, stmt = my_code, number=10000)) #0.01