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Python Functional Python Functional Workhorses Map Comprehension

Posted by John Shockey
John Shockey
45,061 Points

[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 =
John Shockey
John Shockey
45,061 Points

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

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

3 Answers

Steven Parker
Steven Parker
231,271 Points
Steven Parker
Steven Parker
231,271 Points

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

John Shockey
John Shockey
45,061 Points

Hey Steven,

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

Kudakwashe Mungwariri
Kudakwashe Mungwariri
4,951 Points
Kudakwashe Mungwariri
Kudakwashe Mungwariri
4,951 Points

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]

aziztovbaev
aziztovbaev
23,252 Points
aziztovbaev
aziztovbaev
23,252 Points

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

areas = list(map(area, dimensions))