On 2012-5-31 23:01, Ulrich Eckhardt wrote:
Am 31.05.2012 09:57, schrieb Qi:
The first sentence is clear. The second sentence rather sounds as if you
were implementing a Python module in C++. This is the opposite to
embedding Python in C++, it's rather embedding C++ in Python. Or is it a
C++ function called by Python which in turn was embedded by C++?
I think it's bidirectional.
In C++ I use PyRun_SimpleString to run some Python code, then
C++ code can get object from Python code, or call Python function.
Also Python code can call C++ code.
I think that's called "binding"?
I can only guess what you are doing, maybe you should provide a simple
piece of code (or, rather, one C++ piece and a Python piece) that
demonstrates the issue. What I could imagine is that the Python
interpreter shuts down with something it considers an unhandled
exception, which it then prints to stdout before exiting. When
embedding, that shouldn't happen from just calling a Python function in
a loaded script, those should just make the error available to the C++
side via PyErr functions etc.
PyRun_SimpleString("SomeCppFunc(1, 2)");
SomeCppFunc is C++ function bound to Python, and in SomeCppFunc
it detects the parameter mismatch (such as it expects the first
parameter to be a string), it throws an exception.
Then the C++ binding code catches the exception, and call
PyErr_SetString to propagate it to Python.
Then Python will print the error message to console.
What I want to do is to suppress the error message printing...
What I found useful when embedding was that I could assign to sys.stdout
in order to redirect the output. In my case, the target was a window and
not a console. I'd consider that a workaround though. I really suspect
that Python considers the error unhandled and therefore dumps the info
to stdout.
Can I redirect sys.stdout in C++?
Thanks
--
WQ
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