input: 
  from typing import List
  
  def runningTotal(arr: List[int]) -> List[int]:
      """ Calculate the running total of numbers in a given list using numpy.
      >>> runningTotal([1, 2, 3, 4])
      [1, 3, 6, 10]
      >>> runningTotal([5, 3, 7, 9, 2])
      [5, 8, 15, 24, 26]
      """
      import numpy as np
      return np.cumsum(arr).tolist()
  
output:     import numpy as np
      return np.cumsum(arr).tolist()