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  1. # cumulative_sum.py
  2. # MIT OCW 6.189 A Gentle Introduction to Programming Using Python
  3. # Homework 2 > Exercise 2.7 Working With Lists > cumulative_sum
  4. # Glenn Richard
  5. # July 5, 2013
  6.  
  7. def cumulative_sum(number_list):
  8.     # number_list is a list of numbers
  9.     c_sum = 0
  10.     c_sum_list = []
  11.     for number in number_list:
  12.         c_sum += number
  13.         c_sum_list.append(c_sum)
  14.     return c_sum_list
  15.  
  16. def cumulative_sum_list_comp(number_list):
  17.     # number_list is a list of numbers
  18.     return [sum(number_list[:i + 1]) for i in range(len(number_list))]
  19.  
  20. # Test Cases
  21. print "cumulative_sum([1, 2, 3, 4]) is:", cumulative_sum([1, 2, 3, 4])
  22. print "cumulative_sum_list_comp([1, 2, 3, 4]) is:", cumulative_sum_list_comp([1, 2, 3, 4])
  23. print "cumulative_sum([1, 1, 2, 3, 5, 8]) is:",cumulative_sum([1, 1, 2, 3, 5, 8])
  24. print "cumulative_sum_list_comp([1, 1, 2, 3, 5, 8]) is:",cumulative_sum_list_comp([1, 1, 2, 3, 5, 8])
  25.  
Success #stdin #stdout 0.01s 7728KB
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cumulative_sum([1, 2, 3, 4]) is: [1, 3, 6, 10]
cumulative_sum_list_comp([1, 2, 3, 4]) is: [1, 3, 6, 10]
cumulative_sum([1, 1, 2, 3, 5, 8]) is: [1, 2, 4, 7, 12, 20]
cumulative_sum_list_comp([1, 1, 2, 3, 5, 8]) is: [1, 2, 4, 7, 12, 20]
https://ideone.com/x38UtA
MIT OCW 6.189 Homework 2 - Exercise 2.7 - Working With Lists - Cumulative Sum
language:
Python (cpython 2.7.16)
created:
10 years ago
visibility:
public

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