Cut Sentence

Cut Sentence


Your task in this mission is to truncate a sentence to a length that does not exceed a given number of characters.

If the given sentence already is short enough, you don't have to do anything to it. But if it needs to be truncated, the omission must be indicated by concatenating an ellipsis ("...") to the end of the shortened sentence.

The shortened sentence can contain complete words and spaces.
It must neither contain truncated words nor trailing spaces.
The ellipsis has been taken into account for the allowed number of characters, so it does not count against the given length.


Input: Two arguments:

  • one-line sentence as a string (str);
  • max length of the truncated sentence as an integer (int).

Output: The shortened sentence plus the ellipsis (if required) as a one-line string (str).


assert cut_sentence("Hi my name is Alex", 8) == "Hi my..."
assert cut_sentence("Hi my name is Alex", 4) == "Hi..."
assert cut_sentence("Hi my name is Alex", 20) == "Hi my name is Alex"
assert cut_sentence("Hi my name is Alex", 18) == "Hi my name is Alex"


  • line.startswith(' ') == False
  • 0 < len(line) ≤ 79
  • 0 < length ≤ 76
  • all(char in string.ascii_letters + ' ' for char in line)

Invalid hot key. Each hot key should be unique and valid
Hot keys:
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)

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.

Pair Programming (Beta-version)

Welcome to Pair Programming! Engage in real-time collaboration on coding projects by starting a session and sharing the provided unique URL with friends or colleagues. This feature is perfect for joint project development, debugging, or learning new skills together. Simply click 'Start Session' to begin your collaborative coding journey!

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You are trying to join a pair programming session that has not started yet.

Please wait for the session creator to join.

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It looks like the creator of the pair programming session closed the editor window.

It might happen accidentally, so that you can wait for reconnection.

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