tcljupyter is a kernel in Tcl only for use with Jupyter Notebooks


***Installation***


Manually copy to a Jupyter data location `jupyter --paths`.

Then change the paths in `kernel.json` to match your machine.


****Dependencies****


The tcl used to run the `init.tcl` script should have the following available:

http://here.com/what.html%|%link name%|%
   * Tcl 8.6 with threads
   * tclzmq: (https://github.com/jdc8/tclzmq) 
   * rl_json: (https://github.com/RubyLane/rl_json) 0.11.0 or higher
   * tcllib: (https://core.tcl-lang.org/tcllib/doc/trunk/embedded/index.md) uuid
   * tcllib:(https://core.tcl-lang.org/tcllib/doc/trunk/embedded/index.md) sha256

***Supported***

Most web client commands are supported. Only thing missing is reading from stdin with for example `gets`. 
Also interrupting the kernel will display the interruption message under the currently active cell (not the interrupted one).


***Commands***

   * `jupyter::display mimetype body`: Display body in the cell. Returns the display id for use in `updatedisplay`.
   * `jupyter::html body`: Display body as html in the cell. Returns the display id for use in `updatedisplay`. 
   * `jupyter::updatedisplay id mimetype body`: Updates the display with id `id` with then new body.
   * `jupyter::updatehtml id body`: Updates the html display with id `id` with then new body.


If a cell ends with `;` the last result is not displayed.

***Design***

[https://plantuml.mpcjanssen.nl/png/TOx12eCm44Jl-Oh5kpyWfPUSGexnA9H5bnf8rpIR2ltxrYXM3xtEl7bCn9HzxoDoXae7JvmxTYJY9wu01RHJySXOIaoXLFRSRAkEsp4H3WLnxH_6SAOKLyOefHtKzHKiD93e-IB9IjaIkRQ14Na8T7l8NRaMbj0qG3C6XNtsCsPQ9CxiWy5B3FWkzABz9QjKkmDZO5ibabV8Qg2JTLTizVVgfQwtgn8d5le0]


For communication from kernel to session thread `[thread::send -async]` is being used. `stdout` and `stderr` are being intercepted by `chan push`