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Python Functional Python The Lambda Lambada Partials

José Arturo González Navarro
José Arturo González Navarro
7,088 Points

Can someone help me with the answers for partial on functional Python, that is all I am missing to finish the course!!

I understood everything else perfectly but partials, I cant do the challenge.

Thank you!

2 Answers

Chris Freeman
MOD
Chris Freeman
Treehouse Moderator 68,441 Points

I suspect your are stuck on Task 2

# Task 1 of 4
# First, import 'partial' from 'functools'.
from functools import partial

prices = [ 10.50, 9.99, 0.25, 1.50, 8.79, 101.25, 8.00]

def discount(price, amount):
    return price - price * (amount/100)

# A 'partial' is a function where some of its input parameters have
# already been defined.

# The function 'discount' has two parameters: 'price' and 'amount'.
# The new function 'discount_10' has one parameter: 'price'.
# The amount is pre-defined using the 'partial' command

# Task 2 of 4
# Now, use 'partial' to make a version of 'discount' that applies
# a 10% discount. Name this partial function 'discount_10'.
discount_10 = partial(discount, amount=10)

Now, discount_10(15.00) is equivalent to discount(15.00, 10)

Task 3 is an trivial extension to Task2. Task 4 uses map in a straight-forward manner.

Ken Alger
STAFF
Ken Alger
Treehouse Teacher

Jose;

On which Task are you stuck, and what aspect?

Happy coding,
Ken

José Arturo González Navarro
José Arturo González Navarro
7,088 Points

Thank you for your answer Ken, I was stuck on task 2 but I got it now, Have a great day,

Jose