Handle errors from python session

[michaelwooley]

No description provided.

[michaelwooley]

Here is a sample error:

{
    "exc_type": "TypeError",
    "traceback": [
        {
            "name": "<module>",
            "lineno": 4,
            "filename": "<wasm>"
        },
        {
            "name": "f",
            "lineno": 2,
            "filename": "<wasm>"
        }
    ],
    "suppress_context": false,
    "args": [
        "'+' not supported between instances of 'int' and 'NoneType'"
    ],
    "rendered": "Traceback (most recent call last):\n  File \"<wasm>\", line 4, in <module>\n  File \"<wasm>\", line 2, in f\nTypeError: '+' not supported between instances of 'int' and 'NoneType'\n"
}

Catch via:

		try {
			pyExec(code, {
				stdout: (out: string): void => {
					// console.log(`Got stdout: ${out} (JSON/escaped: ${JSON.stringify(out)})`);

					s = s + out;
				}
			});
		} catch (err) {
			console.log(Object.keys(err));
			console.log(err.info);
			console.error(err);
		}

All of the above is in err.info