ctypes

Tracker: Feature Requests

5 Creating a restype supporting type - ID: 2714686

Last Update: Comment added ( theller )

Details:

Hi,

Adding support for classes to be sent as an argument using the argtypes
attribute and from_param(...) method seems pretty straight forward. Can a
similar extension be done to support the restype attribute, or will the
errcheck attribute be needed to do this conversion on the result?

More specifically I'd like to convert from ctypes arrays to NumPy arrays on
the fly when calling a DLL function.

Thanks,

Jens

Submitted:

Jens Rantil ( ztyx ) - 2009-03-26 15:14

Priority:

Status:

Open

Resolution:

None

Assigned:

Nobody/Anonymous

Category:

None

Group:

None

Visibility:

Public

Comment ( 1 )

Date: 2009-03-26 20:55 Sender: theller Since ctypes is now distributed as part of Python, such a request must go into the Python tracker at bugs.python.org. However, the 'callable as restype' protocol is broken because it only works when the foreing function returns an integer; it will not work for functions returning pointers when sizeof(int) != sizeof(void *)'. A new protocol must be developed for this to work in full generality.

Date: 2009-03-26 20:55
Sender: theller

Since ctypes is now distributed as part of Python, such a request must go
into the Python tracker at bugs.python.org.

However, the 'callable as restype' protocol is broken because it only
works when the foreing function returns an integer; it will not work for
functions returning pointers when sizeof(int) != sizeof(void *)'. A new
protocol must be developed for this to work in full generality.

ctypes

Tracker: Feature Requests

Comment ( 1 )

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