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Python Functional Python The Lambda Lambada Partial

What is wrong with this?

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

from functools import partial discount_10 = partial( discount, amount=10 ) discount_25 = partial( discount, amount=25 ) discount_50 = partial( discount, amount=50 )

prices_10 = map( discount_10, prices ) prices_25 = map( discount_25, prices ) prices_50 = map( discount_50, prices )

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


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

from functools import partial
discount_10 = partial( discount, amount=10 )
discount_25 = partial( discount, amount=25 )
discount_50 = partial( discount, amount=50 )

prices_10 = map( discount_10, prices )
prices_25 = map( discount_25, prices )
prices_50 = map( discount_50, prices )

2 Answers

Kenneth Love
STAFF
Kenneth Love
Treehouse Guest Teacher

Yep, just had a slightly too agressive regex on there. Your original post now passes.

Kourosh Raeen
Kourosh Raeen
23,733 Points

I took away the spaces around the parameters in your code and it passed:

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


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

from functools import partial
discount_10 = partial( discount, amount=10 )
discount_25 = partial( discount, amount=25 )
discount_50 = partial( discount, amount=50 )

prices_10 = map(discount_10, prices)
prices_25 = map(discount_25, prices)
prices_50 = map(discount_50, prices)

Thank you!

Chris Freeman
Chris Freeman
Treehouse Moderator 68,423 Points

While I agree with this correct solution, I see this as a challenge checker error since it is only a style error not a syntax error.

Tagging Kenneth Love to review the checker to allow the spaces or provide a PEP-8 related error message.