input: from typing import List
  
  def runningTotal(arr: List[float]) -> List[float]:
      """
      Using numpy, return an array with the running total of numbers in the given list.
  
      >>> runningTotal([1, 2, 3, 4])
      [1, 3, 6, 10]
      >>> runningTotal([0, 0, 0, 1])
      [0, 0, 0, 1]
      >>> runningTotal([10, -1, -1, -1])
      [10, 9, 8, 7]
      """
      import numpy as np
      return np.cumsum(arr)
output:     import numpy as np
      return np.cumsum(arr)