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For functions that take a Python object, a function, for example, there should be a way to pass the Python object (not the PyObj reference) as an argument.

The server cannot send requests to the JS API, which means a PyCall for JavaScript functions, a JSCall, seems impossible to implement at the moment.

No mathematical operations can be done on Python object references through JavaScript using the standard operators (+, -...).
That happens because Python object references (PyObjs) are seen in JavaScript as dicts.

jQuery AJAX calls have a timeout.

The current structure of the module makes it hard to maintain. Bugs are becoming harder to track and there's lots of recursion going on.

The module will be separated in different parts: PyTypes will handle serialization (this time more efficiently, using a custom JSONEncoder and JSONDecoder), PaperServer will run the server which will take care of the AJAX requests done by JavaScript, PaperUtils will contain utilities both for Python and JavaScript.

The JavaScript won't have to change, as it's already pretty well structured (which surprises me).

Objects that cannot be serialized to JSON are not correctly converted if they are contained inside a dict, list or tuple.

The Python object isn't converted to a PyObj, which causes a TypeError.

Some types (numpy.Array, for example) still cannot be represented in JavaScript, which results in multiple errors.

Possible workaround: Implement a way to extend PyObj.

Trying to import re results in an error at the line json.dumps(data) (229): TypeError: keys must be a string.

Trying to import numpy results in SyntaxError: JSON Parse error: Unexpected identifier "Infinity" at column 22, line 20.

We need a better memory management solution.

If the list or dict has non-json-serializeable objects, these are not converted, which causes a TypeError.