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Posted April 22, 2016 4:40pm by

reduce , map and add error

Finally, we're ready to find our totals. Create a variable named total. Use map() to find the per-product totals for each item in prices, then use reduce (and add) to find the total value.

prices.py

from operator import add
from functools import reduce
prices = [
    (6.99, 5),
    (2.94, 15),
    (156.99, 2),
    (99.99, 4),
    (1.82, 102)
]

def product_sales(item):
  return item[0] * item[1]

add(1,2)

total = reduce(add , map(product_sales,prices))