FAQ: List Comprehension - Capitals

This community-built FAQ covers the “Capitals” exercise from the lesson “List Comprehension”.

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FAQs on the exercise Capitals

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This exercise asked to contain the string “capital, country” but this was not added in the solution. How are we expected to get it right if we are given faulty directions?

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Yeah it had me confused at first.
“Capital, country” refers to the format that is required for the answer to be correct.
In other words, your answer has to be ordered by capital, a comma, and the country, like this:
[‘Santiago, Chile’, ‘Paris, France’, ‘Copenhagen, Denmark’]

capitals = [“Santiago”, “Paris”, “Copenhagen”]
countries = [“Chile”, “France”, “Denmark”]

My answer : print(list(zip(capitals, countries)))

Given solution :
locations = [capital + ", " + country for (capital, country) in zip(capitals, countries)]


I can’t understand the difference. if anyone ? please tell me

Your output,

[('Santiago', 'Chile'), ('Paris', 'France'), ('Copenhagen', 'Denmark')]

The solution output,

['Santiago, Chile', 'Paris, France', 'Copenhagen, Denmark']

Greetings fellow users,

Is there a reason these code challenges are using the python 2.7 shell? This exercise, for example, would have been a lot easier using a python 3.6+ syntax:

locations = [f'{a}, {b}' for (a,b) in zip(capitals, countries)]

capitals = ["Santiago, ", "Paris, ", "Copenhagen, "]
countries = [“Chile”, “France”, “Denmark”]
locations = zip(capitals, countries)
locations = [item1 + item2 for (item1, item2) in locations]

My output:
[‘Santiago, Chile’, ‘Paris, France’, ‘Copenhagen, Denmark’]

My solution is incorrect. Why?

EDIT: locations = [item1 + ", " + item2
I added the ", " directly to the first list, so it wasn’t technically correct. The ", " in between fixed my problem.

i dont get why my code does not run. its like the same thing

capitals = [“Santiago”, “Paris”, “Copenhagen”]

countries = [“Chile”, “France”, “Denmark”]

locations = zip(capitals + countries)

locations = [item1 + ’ ’ + item2 for (item1,item2) in locations]


the solution says in last line

locations = [capital + ", " + country for (capital, country) in zip(capitals, countries)]

but zip isnt even being used before

zip() takes two or more arguments. Above you are creating a single list, meaning it is only one argument. Use comma instead of plus sign.

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