Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

Python Functional Python Functional Workhorses Map Comprehension

[SOLVED] Stuck on task 2 of 2

Now make a variable named areas that calculates the area of each item in dimensions using your area function. You should do this with a list comprehension.

dimensions = [ (5, 5), (10, 10), (2.2, 2.3), (100, 100), (8, 70), ]

def area(dimensions): return dimensions[0] * dimensions[1]

areas = ???

maps.py
dimensions = [
    (5, 5),
    (10, 10),
    (2.2, 2.3),
    (100, 100),
    (8, 70),
]

def area(dimensions):
    return dimensions[0] * dimensions[1]

areas = 

FIGURED IT OUT! Just had to read the python docs.

areas = [area(x) for x in dimensions]

3 Answers

Steven Parker
Steven Parker
229,644 Points

:+1: Congrats! Now mark your title with [SOLVED] as an alternative to selecting a best answer.

Hey Steven,

Would you be able to help me with this? https://teamtreehouse.com/community/completely-stuck-on-task-4-of-4

hi guys,i dont know whats wrong here.Please help

'Error:areas contains some incorrect values.'

dimensions = [ (5, 5), (10, 10), (2.2, 2.3), (100, 100), (8, 70), ]

def area(x): for a in x: a*a return a*a

areas = [area(a) for a in dimensions]

Instructions are tricky... It's solved with list() method.

areas = list(map(area, dimensions))