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VarIsPythonClass doesn`t work fine for new-style python clas

daydaysy Posted: Sat May 21, 2005 1:56 pm

Joined: 21 May 2005

Posts: 13

VarIsPythonClass doesn`t work fine for new-style python clas

In procedure btnTestObjectsClick of demo25,
After I changed "class Foo:" into "class Foo(object):",
the testobject will fail at this line:
Assert( VarIsPythonClass(_main.Foo) );
Is this because we can`t access new-style calsses from
delphi?

Thanks in advance.

morgan_martinet Posted: Sat May 21, 2005 9:49 pm

Joined: 29 Apr 2005

Posts: 103

VarIsPythonClass doesn`t work fine for new-style python clas

Hi,

> In procedure btnTestObjectsClick of demo25, After I changed "class
> Foo:" into "class Foo(object):", the testobject will fail at this
> line:
> Assert( VarIsPythonClass(_main.Foo) ); Is this because we can`t
> access new-style calsses from delphi?

No this is a bug of P4D and is not related to Delphi. The function
VarIsPythonClass simply checks that the python object has a PyClass_Type
type, which is false with new-style python classes.
I will fix it in the next release, thanks for reporting it!

In the mean time, as a workaround, you can use the python inspect module
like this:

If Boolean(Import(`inspect`).isclass(myClass)) then...

Bye,

Morgan

daydaysy Posted: Sun May 22, 2005 10:01 am

Joined: 21 May 2005

Posts: 13

VarIsPythonClass doesn`t work fine for new-style python clas

Thank you so much~

And I want to say that P4D is magic!
But if more docs can be found, p4d will be perfect.

--- In pythonfordelphi@yahoogroups.com, "Morgan Martinet" <yahoo@m...>
wrote:
> Hi,
>
> > In procedure btnTestObjectsClick of demo25, After I changed "class
> > Foo:" into "class Foo(object):", the testobject will fail at this
> > line:
> > Assert( VarIsPythonClass(_main.Foo) ); Is this because we can`t
> > access new-style calsses from delphi?
>
> No this is a bug of P4D and is not related to Delphi. The function
> VarIsPythonClass simply checks that the python object has a PyClass_Type
> type, which is false with new-style python classes.
> I will fix it in the next release, thanks for reporting it!
>
> In the mean time, as a workaround, you can use the python inspect module
> like this:
>
> If Boolean(Import(`inspect`).isclass(myClass)) then...
>
> Bye,
>
> Morgan

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