mixing PyQt(5) and Boost.Python

Stefan Seefeld stefan at seefeld.name
Wed Jul 21 14:20:59 BST 2021

On 2021-07-21 2:57 a.m., Phil Thompson wrote:
> On 20/07/2021 21:44, Stefan Seefeld wrote:
>> Hello,
>> I'm working on Python bindings for a set of C++ libraries /
>> applications, some of which are using Qt.
>> The application code is instantiating many Qt objects, some of which I
>> now want to expose to Python. For in-house C++ APIs this is easy, as I
>> merely need to reflect the C++ types to Python using Boost.Python, so
>> I can have functions such as
>> ```
>> class A;
>> std::shared_ptr<A> create_a();
>> ```
>> exposed to Python such that both, the type `A` as well as the function
>> `create_a()` are known in Python.
>> Now assume `A` is actually a type with an existing Python wrapper in
>> PyQt5. How can I instantiate `A` in C++ and then pass it to the Python
>> runtime such that the PyQt5 bindings are used ? (To make this
>> concrete, I want to make the `QQMLApplicationEngine` instance of my
>> C++ app accessible in Python, so that I can use Python to script and -
>> more importantly - introspect and test my application's GUI.
>> Any pointers ?
> Start with this...
> https://www.riverbankcomputing.com/static/Docs/sip/abi_12.html#abi-v12-for-handwritten-code 

It looks like the functions I'm looking for are 
`|sipConvertFromNewType|` and `|sipConvertFromType|`, correct ?

Thanks !


       ...ich hab' noch einen Koffer in Berlin...

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