example.py

# How would you count the numbers in this list in as few lines of code as possible?
numbers = [1, 2, 3, 4, 5]

# 1. Charlie sums the numbers up using a for loop:
total = 0
for number in numbers:
  total += number

# 2. Bob sums the numbers up using the reduce function:
from functools import reduce
total = reduce(lambda x, y: x + y, numbers)

# 3. Alice sums up the numbers with the sum function:
total = sum(numbers)