Liii STEM

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Python Session Plugin ​

In Liii STEM, you can run Python code by inserting a Python session block.

Enter a Python session ​

First, make sure Python is installed on your computer. Then click Insert session -> Python in the mode toolbar.

After first insertion, the page will look like this:

Run code ​

Type code in the block and run it.

Liii STEM supports all available conda environments.

Plugin usage notes ​

Open Help -> Plugins -> Python to view the full plugin guide.

Statement input ​

Use Shift + Return/Enter to separate statements.

When ready to evaluate code, press Enter / Return.

For multi-line input, enable Focus -> Input options -> Multiline input, then use Enter to add new lines.

If you see the state above, multiline input is enabled.

Command auto-completion ​

Type the first character(s) of built-in or previously defined commands, then press Tab to cycle suggestions.

PostScript output and matplotlib support ​

Use ps_out(data) to output PostScript data directly to TeXmacs/Liii STEM:

  • If data is a multi-line string, it is treated as raw PostScript.
  • If data is a single-line string, it is treated as a PostScript file path (.eps/.ps can be inferred).
  • If data is a matplotlib.pyplot.Figure (with a PS-capable backend), the plugin calls savefig() and inserts the output.
  • If data has a read method, PostScript is read from it.

Help popup ​

If object source code is available via inspect.getsource(), typing the object name followed by ? opens a popup with help() and source.

As a scripting language ​

Click Insert -> Fold -> Executable -> Python to create a runnable field:

Enter Python expressions/statements in the yellow box:

Press Return / Enter to toggle between raw input and evaluated output.

For complex code, use Shift + Return/Enter for multiline input.

Note:

  • Expressions are evaluated via eval() and can return inline output.
  • Statements are compiled via compile(); the final return value is not shown.
  • For inline output in statement-heavy code, write to os.sys.stdout.

You can also use Document -> Scripts -> Python, or insert evaluable fields via Insert -> Link.

Again, Return/Enter toggles calculated vs. uncalculated view.