Why does calling dynamicCall and querySubObject always get an error in QAxWidget?

howerl

The development environment is python 3.11 + pyside6. When calling dynamicCall and querySubObject, there is always an error message saying "Unexpected type: (str, int) possible type: (bytes, any)(bytes, sequence)", the code example used is as follows, please see what went wrong? Can you provide the correct call method?

self.ax_widget2.dynamicCall("ActiveDocument.GoTo(int)", 10)

hskoglund

Hi, you're sure it's not just a warning? i.e. the call worked but resulted in a warning.

JonB

@howerl
Maybe it is only a warning as @hskoglund says. But if it needs to be fixed, the message seems to be telling you that you are passing a Python str for the first argument but it wants a Python bytes type. Try:

self.ax_widget2.dynamicCall("ActiveDocument.GoTo(int)".encode('utf-8'), 10)

?

howerl

@JonB i tried the code, there is no warning again, but error generated when running, the info as follow:

self.ax_widget.dynamicCall("ActiveDocument.GoTo(int)".encode('utf-8'), 10)
ValueError: 'PySide6.QtAxContainer.QAxBase.dynamicCall' called with wrong argument values:
PySide6.QtAxContainer.QAxBase.dynamicCall(b'ActiveDocument.GoTo(int)', 10)
Found signature:
PySide6.QtAxContainer.QAxBase.dynamicCall(bytes, Any = Invalid(typing.Any), Any = Invalid(typing.Any), Any = Invalid(typing.Any), Any = Invalid(typing.Any), Any = Invalid(typing.Any), Any = Invalid(typing.Any), Any = Invalid(typing.Any), Any = Invalid(typing.Any))

howerl

@hskoglund I'm very confused about the syntax of pyside6, there is very little information on the Internet, and I can't find a standard usage also

JonB

@howerl said in Why does calling dynamicCall and querySubObject always get an error in QAxWidget?:

PySide6.QtAxContainer.QAxBase.dynamicCall(b'ActiveDocument.GoTo(int)', 10)

The b'...' makes it a bytes type, as expected. I do not know why Python says

PySide6.QtAxContainer.QAxBase.dynamicCall(bytes, Any = Invalid(typing.Any), Any = Invalid(typing.Any), Any = Invalid(typing.Any), Any = Invalid(typing.Any), Any = Invalid(typing.Any), Any = Invalid(typing.Any), Any = Invalid(typing.Any), Any = Invalid(typing.Any))

is not a matching signature for your call.

If you are able to temporarily install PyQt6 you could try this call there and see whether it is accepted/rejected. In the past there have been cases where PyQt accepts things correctly where PySide does not.

P.S.
I'm not all sure this will work, but you might try

dynamicCall(b'ActiveDocument.GoTo(int)', [ 10 ])`

to see if that is accepted.

howerl

@JonB I tried it in PyQt6, it looks like right. It's a weird thing that the same syntax doesn't report errors on PyQt6, but not on PySide6. And PySide6 lacks a corresponding explanation, which is simply too bad.

JonB

@howerl said in Why does calling dynamicCall and querySubObject always get an error in QAxWidget?:

@JonB I tried it in PyQt6, it looks like right.

Yes, I thought that might be the case. Indicating that what you are trying to do is in principle correct, but PySide has flaws. Did you try the [ 10 ] list argument in place of the 10 integer argument, in case PySide accepts that?

P.S.
You would need a Qt PySide person to look at this. I don't know whether it's appropriate, but I'm putting a shout-out to @CristianMaureira here, he seemed to answer a question recently implying he is a Qt in-house PySide development type?

howerl

@JonB Thanks！do you know where i can find docs of PySide6 for more details?

JonB

@howerl
There are no docs with extra details.... Things are supposed to work in principle as from C++, and the PySide docs are mostly translations from that.