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A ProcessingJS kernel for Jupyter

Project description

**Calysto Processing** is the merging of [ProcessingJS]( with [Project Jupyter]( (aka IPython). Processing Sketches are entered into Jupyter notebook cells, and even run in rendered notebooks. Sketches can be paused, and stepped one draw() at a time.

Because Calysto Processing uses [MetaKernel](, it has a fully-supported set of "magics"---meta-commands for additional functionality. A list of magics can be seen at [MetaKernel Magics](

Calysto Processing in use:

* [CS110: Introduction to Computing](
* [Video](

You can install Calysto Processing with:

pip install --upgrade calysto-processing

or in the system kernels with:

sudo pip install --upgrade calysto-processing

Next, install Processing 2 from

You will need to make sure that you have installed and access to the `processing_java` command. Mac users will need to install it from Processing by selecting 'Install "processing_java"' under the Tools menu.

Finally, edit the installed `calysto_processing/kernel.js` to include the full path to the `processing_java` command. That might look like:

"-m", "calysto_processing",
"-f", "{connection_file}"],
"display_name": "Calysto Processing",
"env": {"PROCESSING_JAVA": "/home/dblank/Desktop/processing-2.2.1/processing-java"},
"language": "java",
"name": "calysto_processing"

Use it in the notebook with:

ipython notebook

and then select `Calysto Processing` for a new notebook.

Calysto Processing also has an enhancement: Tables, and some related functions:

/* @pjs includeTable="true"; */

Table table;

void setup() {
table = loadTable("test.csv", "header");
println(table.getRowCount() + " total rows in table");

long findMax() {
int retval = 0;
for (TableRow row : table.rows()) {
int pop = row.getInt("Population");
if (pop > retval)
retval = pop;
return retval;

Table-related classes and methods:

* loadTable(CSV_FILNAME, "header");
* Table class
* TableRow class
* table.rows() - returns iterator for use with for(TableRow row : table.rows()) {...}
* row.getInt(COLUMN_NAME)
* row.getString(COLUMN_NAME)
* row.getFloat(COLUMN_NAME)

See source for more details.

Example notebooks can be found in


* ipython-3.0
* Python2 or Python3
* metakernel (installed with pip)
* calysto (installed with pip)

Calysto Processing supports:

* MetaKernel Magics
* All of ProcessingJS, plus pause/restart and stepper

Project details

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