How to use the ipycanvas.py2js.Py2JSVisitor function in ipycanvas

def py2js(value):
    """Convert Python code or Python function to JavaScript code."""
    if isinstance(value, str):
        parsed = ast.parse(value, '', 'exec')

        return ';\n'.join([Py2JSVisitor().visit(node) for node in parsed.body])

    if isinstance(value, (types.FunctionType, types.MethodType)):
        if getattr(value, '__name__', '') in ('', ''):
            raise RuntimeError('Anonymous functions not supported')

        value = inspect.getsource(value)

        module = ast.parse(value, '', 'exec')

        func = module.body[0]

        return ';\n'.join([Py2JSVisitor().visit(node) for node in func.body])

    raise RuntimeError('py2js only supports a code string or function as input')