Lightbulb End Watching
In the third mission from the series about lightbulbs, I want to separately highlight the process and the period of observation of this process.
In the previous mission, the start_watching parameter was introduced, and in this one - the end_watching parameter, which tells the time when it’s necessary to end the observation. If it’s not passed, the mission works as in the previous version, with no observation time limit.
One more update is that the amount of elements (button clicks) can be odd (previously there was a precondition, that the amount of elements is always even). In this case the parameters of start and end watching are necessarily present.
Input: Three arguments and only the first one is required. The first one is a list of datetime objects, the second and the third ones are the datetime objects.
Output: A number of seconds as an integer.
Example:
sum_light([
datetime(2015, 1, 12, 10, 0, 0),
datetime(2015, 1, 12, 10, 10, 10),
datetime(2015, 1, 12, 11, 0, 0),
],
datetime(2015, 1, 12, 10, 10, 0),
datetime(2015, 1, 12, 11, 0, 10)) == 20
sum_light([
datetime(2015, 1, 12, 10, 0, 0),
],
datetime(2015, 1, 12, 9, 9, 0),
datetime(2015, 1, 12, 10, 0, 0)) == 0
sum_light([
datetime(2015, 1, 12, 10, 0, 0),
datetime(2015, 1, 12, 10, 10, 10),
datetime(2015, 1, 12, 11, 0, 0),
datetime(2015, 1, 12, 11, 10, 10),
],
datetime(2015, 1, 12, 9, 0, 0),
datetime(2015, 1, 12, 10, 5, 0)) == 300
Precondition:
- The array of pressing the button is always sorted in ascending order.
- The array of pressing the button has no repeated elements.
- The minimum possible date is 1970-01-01
- The maximum possible date is 9999-12-31
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)
Install CheckiO Client first:
pip3 install checkio_client
Configure your tool
checkio --domain=py config --key=
Sync solutions into your local folder
checkio sync
(in beta testing) Launch local server so your browser can use it and sync solution between local file end extension on the fly. (doesn't work for safari)
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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