List comprehension for running total

Question

I want to get a running total from a list of numbers.

For demo purposes, I start with a sequential list of numbers using range

a = range         


        

Answer 1

If you can use numpy, it has a built-in function named cumsum that does this.

import numpy
tot = numpy.cumsum(a)  # returns a numpy.ndarray
tot = list(tot)        # if you prefer a list