input: from typing import List
  
  def runningTotal(arr: List[int]) -> List[int]:
      """
      Compute the running total of numbers in a given list using numpy's cumsum function.
      
      >>> runningTotal([1, 2, 3, 4])
      [1, 3, 6, 10]
      >>> runningTotal([5, 3, -1, 0])
      [5, 8, 7, 7]
      """
      return np.cumsum(arr)
output:     import numpy as np