Unable to pass None as a value to certain parameters

[addrob]

If you try to directly pass None as a value for

"qty",
"price",
"triggerPrice",
"takeProfit",
"stopLoss"

it will be passed to API as a "None" value.

My guess is that the pybit._http_manager._V5HTTPManager.prepare_payload method is responsible for that. It tries to cast values for these params straight to str without caring what type they were originally even if it was a NoneType.

[dextertd]

Why would you pass None? If you don't want to pass anything to a param, there's no need to pass it at all. Adding extra params with dead data is inefficient for an HTTP request.

[kolya5544]

Passing "None" values might be useful for complex logic, like passing the price only when the order is Limit:

client.place_order(
            category="linear",
            symbol="OPUSDT",
            side="Sell",
            orderType=orderType,
            qty="0",
            price=price if orderType == "Limit" else None,
            reduceOnly=True,
            closeOnTrigger=True
        )

Most libraries using JSON serialization will set the serializer to ignore null values for this reason specifically. It's also considered the best practice to omit null values for query string values (GET HTTP request).

Just my humble opinion 😃