Return value as Python type

[j-ti]

Should return value e.g. the created account string (which could be put also inside a dictionary) or the matches as Python List:
Could be similar to the following example for returning a python List of dictionaries:

    // Convert MarketOutput to Python List of Dict representing matches
    let pyMatches = PyList::new(py,
        matches.matches.into_iter().map(|mtch| {
            let dict = PyDict::new(py);
            dict.set_item("time", mtch.energy_kwh);
            dict.set_item("bid_id", mtch.bid_id);
            dict.set_item("ask_id", mtch.ask_id);
            dict.set_item("bid_actor", "");
            dict.set_item("ask_actor", "");
            dict.set_item("bid_cluster", 0);
            dict.set_item("ask_cluster", 0);
            dict.set_item("energy", mtch.energy_kwh);
            dict.set_item("price", mtch.price_euro_per_kwh);
            dict.set_item("included_grid_fee", 0);
            dict
        })
    );

As both types are different the account string or the match list could be it self returned within a dictionary with a specific key, i.e. {"account": account_string} or {"matches": pyMatches}

Originally posted by @j-ti in #3 (comment)

[j-ti]

Return type should be PyResult<Py<PyDict>>

[j-ti]

We agreed on returning the PyDict by each command function and just forward it to the dispatching run_cli return

[j-ti]

Also Errors should be forwarded, in that turn also commands need to preferably return Error rather than to panic! as these cannot be handled well, e.g. olisystems/BEST-Energy#53