Two things spring instantly to mind (thanks for the reminder)
1) A patch has been submitted that tries very cleverly to allow out
params to be omitted. This sounds like it's worth pursuing.
2) iPy's Reference type is something that I looked into implementing
which would (or could) allow the wrap
Because the Python.Runtime library also provides means of embedding
python in a .NET program using pinvoke to call the native python
dll, it is, by nature, "unsafe".
On 01/22/2013 05:00 PM, b...@fie.us
wrote:
Just to clarify: neither version of th
Krause
> *Sent:* Tuesday, January 22, 2013 10:08 PM
>
> *To:* pythondotnet@python.org
> *Subject:* Re: [Python.NET] Problem with System.ArgumentException in call
> to method from dll
>
> ** **
>
> @Brett
>
> ** **
>
> When I try
>
> ** **
>
As previously said you have to probably do something like:
from System.Windows.Media.Imaging import BitmapSource
bitmapsrc = None
cam = xiCam()
cam.OpenDevice(0)
cam.SetParam(PRM.BUFFER_**POLICY, BUFF_POLICY.SAFE)
cam.SetParam(PRM.IMAGE_DATA_**FORMAT, IMG_FORMAT.MONO8)
cam.StartAcquisition()
time
I tried this approach:
class PyBitmapSource(BitmapSource):
pass
bitmapsrc = PyBitmapSource()
print bitmapsrc
The console output does not really change:
TypeError: cannot instantiate abstract class
2013/1/23 Barton
> The Python.Runtime is a bit tricky when it comes to out parameters:
> In
rause
Sent: Tuesday, January 22, 2013 10:08 PM
To: pythondotnet@python.org
Subject: Re: [Python.NET] Problem with System.ArgumentException in call to
method from dll
@Brett
When I try
bitmapsrc = BitmapSource()
I get the following error:
Traceback (most recent call last):
File "C:
Out of curiosity Barton, could you pass "None" rather than constructing
instances? Or does it truly need the argument to have a type in order to
disambiguate overloaded methods?
Also, it is my understanding that in iPy, out parameters are often omitted from
the method's arguments. But in Pyth
@Brett
When I try
bitmapsrc = BitmapSource()
I get the following error:
Traceback (most recent call last):
File "C:\Users\mdk\workspace\\camera\testbitmap.py", line 8, in
bitmapsrc = BitmapSource()
TypeError: cannot instantiate abstract class
I will have a look at System.Reflection, tha
The Python.Runtime is a bit tricky when it comes to out parameters:
In C# DateTime.TryParse(String, out DateTime) becomes
>>> d = DateTime(0)# just a dummy to call the method on
>>> d2 = DateTime(0) # another dummy to satisfy the out parameter
(could be the same instance, d)
# d3 is were th
Just to clarify: neither version of the methods you are calling are marked
"unsafe" in the proper c# .net manner are they? I would not be surprised to
find PythonNet not providing access to "unsafe" methods. I would need to take
a trip through the source to verify.
On Jan 22, 2013, at 4:10 P
lem with System.ArgumentException in call to
method from dll
That is right, I want to get the value of the output parameter.
The following variant looks much more logical to me, but than I get another
error:
bitmapsrc = cam.GetImage(timeout)
TypeError: No method matches given arguments
So it seems that I have to
That is right, I want to get the value of the output parameter.
The following variant looks much more logical to me, but than I get another
error:
bitmapsrc = cam.GetImage(timeout)
TypeError: No method matches given arguments
So it seems that I have to pass the "out"-parameter to the method as we
You are setting the bitmapsrc variable to be equal to the class BitmapSource.
I assume you mean to get the value of an output parameter, rather than pass a
class object into the method.
Though I do not speak german. But I think that's it.
On Jan 22, 2013, at 2:58 PM, Daniel Krause
wrote:
>
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