installing/Executing Python4Delphi App on MacOs (Lazarus) (could not map symbol "Py_DebugFlag")

[matrix1233 0]

Hi,

Am trying to execute a simple application (Demo1) with Python4Delphi on MacOs Catalina so i tried two Method:

Method 1: - Compiling Demo1 on Windows to    - Target OS : Darwin  

                                                                                 - Target CPU i86_64

                     => Demo1 app is generated correctly and when i move it to Mac and i execute it i have a Error  ( Error: could not map symbol "Py_DebugFlag" )

                                                      

 

 

Method 2: - Installing Lazarus on MacOs with Python4Delphi and executing the Demo1 (of corse i added the correct path to the lib ) :

                     => Demo1 when start it generate the same  Error (See the screenshot below)

 

                                         

 

How can i correct this ? 

Thanks

 

 

 

 

 

Edited December 25, 2020 by matrix1233

[pyscripter 689]

Are you sure you are using the latest version from pyscripter/python4delphi: Free components that wrap up Python into Delphi and Lazarus (FPC) (github.com)?

[matrix1233 0]

Yes it's the latest version installed on Lazarus Windows and Lazarus MacOs (just for info When i change the target (to compile on windows) of lazarus installed on Windows it's work ) 

Edited December 26, 2020 by matrix1233

[pyscripter 689]

Strange.  Py_DebugFlag should be exported on all platforms.  Please uncomment the line with the Import  - Import(Py_DebugFlag).  Does it work then?

[matrix1233 0]

Now i have Error on Py_VerboseFlag (please see the screenshot below) 

 

 

[pyscripter 689]

In that case what happens of you comment out the importing of all flags?

Edited December 28, 2020 by pyscripter

[matrix1233 0]

Hi if i comment from Import('Py_DebugFlag') to Import('Py_IgnoreEnvironmentFlag') i have :

 

 

and if you means that i have to comment from Import('Py_DebugFlag') to Import('PyGILState_Release') i have this error :

Edited December 28, 2020 by matrix1233

[pyscripter 689]

Ok.  There must be something wrong with the dynamic library you are using.   P4D has been used without such issues in MacOS.

Could you please try to install a different version of python say 3.7 or 3.9 and test with that?

 

Can any other MacOS user shed some light here?

Edited December 28, 2020 by pyscripter

[matrix1233 0]

The strange think is if i install python4lazarus( https://github.com/Alexey-T/Python-for-Lazarus/) it's work. i will install now python3.9  and i will test

Edited December 28, 2020 by matrix1233

[pyscripter 689]

11 minutes ago, matrix1233 said:

The strange think is if i install python4lazarus( https://github.com/Alexey-T/Python-for-Lazarus/) it's work

But the two are almost identical nowadays and they both import Py_DebugFlag etc.   Could you please pinpoint what makes the differences (e.g. by stepping through the code)?  That would be very useful.  

 

If you do have access to Delphi for the MacOS can you please also try with that?

Edited December 28, 2020 by pyscripter

[matrix1233 0]

Hi,

I installed the last version of python on my Mac

 

 

With python 3.9.i have the same error =>

 

 

I installed a second time python4lazarus to test with python3.9 and it's work ==>

 

 

Now i added another test :

 1 - Installed Python4lazarus (with working demo1)

 2 - using Demo1 with library of lazarus and changing the file PythonEngine.pas (lazarus) with the PythonEngine.pas (python4Delphi)  and i have the same error ( Error: could not map symbol "Py_DebugFlag" ) so the problem is on this file .

 

At this time i do not  have access to access to Delphi for MacOS. i will test when i will have access as soon possible.

 

 

Edited December 28, 2020 by matrix1233

[pyscripter 689]

3 hours ago, matrix1233 said:

1 - Installed Python4lazarus (with working demo1)

 2 - using Demo1 with library of lazarus and changing the file PythonEngine.pas (lazarus) with the PythonEngine.pas (python4Delphi)  and i have the same error ( Error: could not map symbol "Py_DebugFlag" ) so the problem is on this file .

Could you debug MapDLL in both and try to see whether they differ?  I have looked at the code and could not see any significant difference.

 

Edited December 28, 2020 by pyscripter

[pyscripter 689]

See also Import(Py_DebugFlag) fails on MacOS · Issue #27 · Alexey-T/Python-for-Lazarus (github.com)