Capital City Capital City
Simple
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You are an active traveler who have visited a lot of countries. The main city in the every country is its capital and each country can have only one capital city. So your task is to create the class Capital which has some special properties: the first created instance of this class will be unique and single, and all of the other instances should be the same as the very first one.
Also you should add the name() method which returns the name of the capital.
In this mission you should use the Singleton design pattern.

Example :

ukraine_capital_1 = Capital("Kyiv")
ukraine_capital_2 = Capital("London")
ukraine_capital_3 = Capital("Marocco")
ukraine_capital_2.name() == "Kyiv"
ukraine_capital_3.name() == "Kyiv"


Input: The class Capital.

Output: The name of the capital.

How it is used: For creation of a unique object as a single instance.

Precondition: All data is correct.

Settings
Code:
CheckiO Extensions

CheckiO Extensions allow you to use local files to solve missions. More info in a blog post.

In order to install CheckiO client you'll need installed Python (version at least 3.8)

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pip3 install checkio_client

Configure your tool

checkio --domain=py config --key=

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checkio sync

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checkio serv -d

Alternatevly, you can install Chrome extension or FF addon

checkio install-plugin
checkio install-plugin --ff
checkio install-plugin --chromium

Read more here about other functionality that the checkio client provides. Feel free to submit an issue in case of any difficulties.

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