Sort the given sequence so that its elements should be grouped and those groups end up in the decreasing frequency order, that is, the number of times element appears in the sequence. If two elements have the same frequency, their groups should end up according to the natural order of elements. For example:
If you want to practice more with the similar case, try Sort Array by Element Frequency mission.
Input: List of integers (int).
Output: List or another Iterable (tuple, iterator, generator) of integers (int).
assert list(frequency_sorting([1, 2, 3, 4, 5])) == [1, 2, 3, 4, 5] assert list(frequency_sorting([3, 4, 11, 13, 11, 4, 4, 7, 3])) == [ 4, 4, 4, 3, 3, 11, 11, 7, 13, ]
How it is used: For analyzing data using mathematical statistics and mathematical analysis, and for finding trends and predicting future changes (systems, phenomena, etc.).
- list length <= 100;
- max number <= 100.
The mission was taken from Python CCPS 109. It is taught for Ryerson Chang School of Continuing Education by Ilkka Kokkarinen
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
(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 --ff
checkio install-plugin --chromium