switching python version in virtualenv

by Mariatta 7 years ago

macOS ◆ xterm-256color ◆ bash 25847 views

Demo of changing python version inside virtualenv

create and activate venv with python 2.7
install package dependencies for python 2.7
change venv to python 3.6
install package dependencies for python 3.6
change venv to python 2.7 again
package dependencies still available in python 2.7
change to python 3.6 once again
package dependencies still available in python 3.6

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You can download this recording in asciicast v1 format, as a .json file.

Download

Replay in terminal

You can replay the downloaded recording in your terminal using the asciinema play command:

asciinema play 99017.json

If you don't have asciinema CLI installed then see installation instructions.

Use with stand-alone player on your website

Download asciinema player from the releases page (you only need .js and .css file), then use it like this:

<!DOCTYPE html>
<html>
<head>
  <link rel="stylesheet" type="text/css" href="asciinema-player.css" />
</head>
<body>
  <div id="player"></div>
  <script src="asciinema-player.min.js"></script>
  <script>
    AsciinemaPlayer.create(
      '/assets/99017.json',
      document.getElementById('player'),
      { cols: 152, rows: 34 }
    );
  </script>
</body>
</html>

See asciinema player quick-start guide for full usage instructions.

While this site doesn't offer GIF conversion at the moment, you can still do it yourself with the help of asciinema GIF generator utility - agg.

Once you have it installed run the following command to create GIF file:

agg https://asciinema.org/a/99017 99017.gif

Or, if you already downloaded the recording file:

agg 99017.json 99017.gif

Check agg --help for all available options. You can change font family and size, select color theme, adjust speed and more.

See agg manual for full usage instructions.