input: from typing import List
  
  def runningTotal(arr: List[float]) -> List[float]:
      """
      Using numpy, create a function which returns an array with the running total of numbers in a given list.
      
      >>> runningTotal([1.0, 2.0, 3.0])
      array([1., 3., 6.])
      
      >>> runningTotal([0.0, 0.0, 0.0, 1.0])
      array([0., 0., 0., 1.])
      """
      import numpy as np
      return np.cumsum(arr)
output:     import numpy as np
      return np.cumsum(arr)