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pyscripter

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Everything posted by pyscripter

  1. pyscripter
    I have no idea why and how you are building a DLL, but from the size I can tell that you are pulling in a large chank of the Delphi RTL. Not except the source code.
  2. pyscripter
    @dnbif72 Support for the buffer protocol was added to P4D. A new demo (Demo35) shows how to access (read and write) numpy arrays super fast using the buffer protocol.
  3. pyscripter
    This is a simplified version of what I had in my app. procedure Test(); var TerminateProc: TThreadProcedure; S: string; begin S := 'Terminated'; TerminateProc := procedure begin ShowMessage(S); end; TThread.CreateAnonymousThread( procedure begin // Do stuff TThread.Queue(nil, TerminateProc); TerminateProc := nil; // Memory leak without this end).Start; end; I had to insert the statement with the comment "Memory leak without this" to avoid memory leaks. Any idea why the compiler does not free TerminateProc on its own? Is this a compiler bug?
  4. pyscripter

    Memory leak with anonymous methods.

    pyscripter replied to pyscripter's topic in RTL and Delphi Object Pascal

    You are right. I have removed the code from the post, so as not to confuse people. The code at the first post works well.
  5. pyscripter

    Memory leak with anonymous methods.

    pyscripter replied to pyscripter's topic in RTL and Delphi Object Pascal

    Answer myself. I remember having seen these some time ago, when I have been bitten by this again: delphi - Memory leaks happens in nested anonymous method - Stack Overflow TURBU Tech » Blog Archive » How to leak a class you never defined (turbu-rpg.com) (see Barry Kelly's comment).
  6. pyscripter
    Importing a module for second, third.. time has no significant performance cost.
  7. pyscripter
    For answers see: python4delphi/Tutorials/Webinar II at master · pyscripter/python4delphi (github.com) python4delphi/Tutorials/Webinar II/VarPythDemo at master · pyscripter/python4delphi (github.com)
  8. pyscripter
    Your code leads to memory corruption. PyArg_ParseTuple(args,"y*",&data); will copy the Py_Buffer structure to the address of data overwriting whatever was after that. If you wait for a few days, I will add the Py_Buffer stuff to P4D and provide an example of getting raw access to nympy.ndarray data. Looking forward to receiving C++ Builder installation instructions!
  9. pyscripter
    @dnbif72By the way, since I am not using C++ Builder, I am looking for someone to provide detailed instructions for installing P4D in C++ Builder. The instructions provide David Intersimone are outdated. See for example: No Python_D.dproj project file inside python4delphi-master\Packages\Delphi\Delphi 10.4+. · Issue #416 · pyscripter/python4delphi (github.com) Could you please help?
  10. pyscripter
    What do you expect to be passed to data? Please see the docs: Parsing arguments and building values — Python 3.12.0 documentation "y*" is one of the most esoteric formats. This is the correct way of using it by Victor Stinner one of the python gurus (from this web page). static PyObject * getargs_y_star(PyObject *self, PyObject *args) { Py_buffer buffer; PyObject *bytes; if (!PyArg_ParseTuple(args, "y*", &buffer)) return NULL; bytes = PyBytes_FromStringAndSize(buffer.buf, buffer.len); PyBuffer_Release(&buffer); return bytes; } Note that the Py_buffer structure and related functions are not yet defined in P4D, so you will have to get it from the python headers.
  11. pyscripter

    RunntimeError in simple demo

    pyscripter replied to JonRobertson's topic in Python4Delphi

    Did you install the master branch from pyscripter/python4delphi: Free components that wrap up Python into Delphi and Lazarus (FPC) (github.com)? Here Demo01 and other demos run fine.
  12. pyscripter

    Chilkat Delphi DLL API - Experiences

    pyscripter replied to msd's topic in Network, Cloud and Web

    You may want to give pyscripter/Ssh-Pascal: Delphi ssh library wrapping libssh2 (github.com) a try. It is a wrapper around libssh2, includes scp, sftp, ssh support. Very fast.
  13. pyscripter

    How do I execute code after FormShow ?

    pyscripter replied to dormky's topic in VCL

    Use TThread.ForceQueue from inside the OnShow handler. TThread.ForceQueue accepts an optional delay.
  14. pyscripter
    As per title. For instance: A) Second method hides the first ClassA = class procedure Test(I: Integer); end; ClassB = class(classA) procedure Test(S: string); end; B) Second method overloads the first ClassA = class procedure Test(I: Integer); overload; end; ClassB = class(classA) procedure Test(S: string); overload; end; How can you tell the difference with Rtti. GetMethods would show both methods in a similar way.
  15. pyscripter
    TTest = class A: string; class var B: string; end; Is it possible to tell that B is a class field using Rtti? Ditto for properties. And if you get a chance have a look at my other Rtti question.
  16. pyscripter
    Never mind. I forgot the answer to an older question. No rtti is generated for class fields and properties, which is a shame. It does for class methods though.
  17. pyscripter
    But so do overwritten methods, virtual methods etc.
  18. pyscripter

    Possible memory leak

    pyscripter replied to djxandytche's topic in Python4Delphi

    This was a python reference counting issue. Fixed in version control. Please try the latest version and confirm the issue is solved.
  19. pyscripter

    Can not install P4D package

    pyscripter replied to bojanm's topic in Python4Delphi

    Are you following the instructions at Installation · pyscripter/python4delphi Wiki (github.com)? Specifically, did you build all packages before installing them?
  20. pyscripter

    Possible memory leak

    pyscripter replied to djxandytche's topic in Python4Delphi

    Clear the output?
  21. pyscripter

    Playing with Windows Fibers by emulating Python Generators

    pyscripter replied to darnocian's topic in I made this

    This project deserves some attention (greenlets-coroutines, generators, channels and more). It is based on fibers.
  22. pyscripter

    Unable to run 2 TPythonEngine per VCL application

    pyscripter replied to Dmitry72's topic in Python4Delphi

    You cannot load multiple versions of any dll simultaneously in a single process. If you study Demo 33, you will see that this is not necessarily the case.
  23. pyscripter

    Unable to run 2 TPythonEngine per VCL application

    pyscripter replied to Dmitry72's topic in Python4Delphi

    Why do you conclude that? If you want to run python code in threads, please study Demo 33 and search for related content in this forum (there is lots). Also google for "Global Interpreter Lock".
  24. pyscripter

    Html Help: Ctrl+F not working

    pyscripter posted a topic in General Help

    In my Delphi apps, I use the dated CHM Html Help format to provide user help. When help is invoked from the Delphi app using the Application help commands, Ctrl+F to search within a help page does not work. However, if open the same chm file outside the Delphi app, Ctrl+F works fine. Any clues as to what causes this issue? Note: The Delphi app is compiled with Alexandria (v11) and I am testing on Windows 11.
  25. pyscripter
    Running python in threads is not straightforward. Have a look at TPythonThread, Demo 33, and search this forum for relevant discussions.
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