Lazarus compatibility Patch about python4delphi HOT 6 CLOSED

New Patch to for the Wrap*.pas

Now it can be compiled but still access violations on this poor example:

MyForm = CreateComponent('TForm', None)

or

MyForm = Form(Application)

or am i doing something wrong?

[deleted comment]

I'd also be interested in getting it work (again?) for Lazarus. I made 
independently
that little patch in attachment. Mainly setting ..DELPH7_OR_HIGHER, instead of 
those
many many $IFDEF FPC's, but that may be to much? Visual Components in Laz IDE 
were
not stable - see below, how is yours?

A main concern for me however as of now is usability of VarPyth. 
Callback/Wrapping
perhaps latter.
Here the problem description from a mail I wrote to the P4D-list:

------------
I tried to use current http://code.google.com/p/python4delphi with Lazarus. Did
somebody use P4D successfully with recent Lazarus? Patches? I face a few 
problems.

My aim is to test/use Lazarus+Python as efficient platform independent and free 
dev
environment. As an alternative to the fat and baggy wxPython GUI system. Laz, 
with
very small EXE footprint size and better RAD and tough speed - but just for 
rather
naked GUI wiring (and few speedy loops - alt: Cython), while doing the actual 
app,
data, algo, object, file, interface ... work and all, in Python. Python can 
also use
reversely use Delphi objects/funcs quite simply. Laz claims to be mature, and 
the
first impression is good, just re-compilation a little slower than Delphi.
With Delphi I used this P4D method once in a smaller app some time ago - 
initially
only wanting to re-use some Python modules and then found me shifting more and 
more
all the data/algo work to Python. I felt a ">3x" coding speed up and much better
readability, object orientation, overview, interfaces, flexibility,
dynamics/introspection, debugging, testing etc. While GUI wiring was a lot 
tighter in
D, than wx/wxGlade etc. 

P4D worked principally with Lazarus, but only after a few a adaptations. Mainly
setting DELPHI_4..7_OR_HIGHER. see the little patch in attachment. Is nobody 
using?

(After re-building Lazarus IDE for Visual Python Components it Crashes on usage 
of
non-crucial TPythonGUIInputOutput, and the rebuilt Laz IDE here becomes at all
somewhat instable!? But I stepped back and use the P4D-units/objects just 
manually,
anyway only a few things to set up and wire...)

Yet when using the crucial VarPyth unit, upon basic things like pymod :=
VarPyth.Import('pymod') => EVariantError "Method
TCustomVariantType.VarDataClear not yet supported"

VarPyth variants would allow to walk seamlessly and comfortably into the Python
object tree with the '.' operator like  pymod.myobj.myattr.x(7).y := z; ...
And without that option, much of the P4D charm disappears.
In VarPyth.pas there are many $IFDEF FPC's , but it doesn't seem to work at all 
so far!?.

What about this problem, and what could be a workaround?


### from variants.pp #########
procedure TCustomVariantType.VarDataClear(var Dest: TVarData);

begin
  NotSupported('TCustomVariantType.VarDataClear');
end;
...
#########################

Does any Lazarus user want to become a project member and apply the patches?

Partial compatibility is now restored.  Pls see the relevant Wiki page.

Fixed in version control.  All parts of P4D now work with FPC