input: from typing import List
  
  def runningTotal(arr: List[int]) -> List[int]:
      """Compute the running total of numbers in a given list using numpy.
      >>> runningTotal([1, 2, 3, 4, 5])
      [1, 3, 6, 10, 15]
      >>> runningTotal([10, 20, 30])
      [10, 30, 60]
      """
      import numpy as np
      return np.cumsum(arr).tolist()
output:     import numpy as np
      return np.cumsum(arr).tolist()