The problem is caused by this bug: http://bugs.python.org/issue9867 I've
been trying to make a workaround, but unfortunately there are many other
process calls in the Xlib library, which are suffering from the same
issue.... Though I don't understand why aren't these exceptions raised when
I run a simple python code. Here is an example:
#include <Python/Python.h>
//#include <string>
int main (int argc, const char * argv[])
{
Py_Initialize();
PyRun_SimpleString("import sys;from OCC import V3d;import
subprocess;import time;)");
printf("%s\n",Py_GetPath());
//PyRun_AnyFile(fopen("/Users/istvancsanady/Documents/workspace/butterfly/__main__.py",
"r"), NULL);
PyRun_SimpleString("v3d_module_library =
sys.modules['OCC._V3d'].__file__;p1 =
subprocess.Popen(['otool','-L','%s'%v3d_module_library],stdout=subprocess.PIPE);time.sleep(1);p2
=
subprocess.Popen(['grep','-i','libTkOpenGl'],stdin=p1.stdout,stdout=subprocess.PIPE);time.sleep(1);output
= p2.communicate()[0]");
pause();
return 0;
}
And the exception:
*Traceback (most recent call last):*
* File "<string>", line 1, in <module>*
* File
"/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/subprocess.py",
line 595, in __init__*
* errread, errwrite)*
* File
"/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/subprocess.py",
line 1101, in _execute_child*
* data = os.read(errpipe_read, 1048576) # Exceptions limited to 1 MB*
*OSError: [Errno 4] Interrupted system call*
*
*
*Fortunately I can hardcode the linked libraries if I want to distribute an
app with pyocc, however this bug is a pain in my ass, because I can't
eliminate all process calls in the Xlib... *
*Python version: 2.6*
*Mac OS X 10.6.7*
*
*
*István*
*
*
On Mon, Jun 20, 2011 at 5:42 PM, Thomas Paviot <[email protected]> wrote:
> 2011/6/20 Csanády István <[email protected]>
>>
>> Hi All!
>> I am trying to use pyocc from C++, with the embedded python api. If I
>> run the app from XCode, I got the following errors when initializing
>> SimpleGUI:
>> Traceback (most recent call last):
>> File "???", line 7, in <module>
>> File "/Users/istvancsanady/Documents/workspace/butterfly/src/pool.py",
>> line 12, in <module>
>> display, start_display, add_menu, add_function_to_menu =
>> init_display()
>> File "/Library/Python/2.6/site-packages/OCC/Display/SimpleGui.py",
>> line 173, in init_display
>> from XDisplay import XOCCWindow
>> File "/Library/Python/2.6/site-packages/OCC/Display/XDisplay.py",
>> line 28, in <module>
>> import OCCViewer
>> File "/Library/Python/2.6/site-packages/OCC/Display/OCCViewer.py",
>> line 77, in <module>
>> set_CSF_GraphicShr()
>> File "/Library/Python/2.6/site-packages/OCC/Display/OCCViewer.py",
>> line 62, in set_CSF_GraphicShr
>> p2 =
>>
subprocess.Popen(['grep','-i','libTkOpenGl'],stdin=p1.stdout,stdout=subprocess.PIPE)
>> File
>>
"/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/subprocess.py",
>> line 595, in __init__
>> errread, errwrite)
>> File
>>
"/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/subprocess.py",
>> line 1101, in _execute_child
>> data = os.read(errpipe_read, 1048576) # Exceptions limited to 1 MB
>> OSError: [Errno 4] Interrupted system call
>> Or the other one:
>> Traceback (most recent call last):
>> File "???", line 7, in <module>
>> File "/Users/istvancsanady/Documents/workspace/butterfly/src/pool.py",
>> line 12, in <module>
>> display, start_display, add_menu, add_function_to_menu =
>> init_display()
>> File "/Library/Python/2.6/site-packages/OCC/Display/SimpleGui.py",
>> line 174, in init_display
>> win = XOCCWindow(display_xlib.Display(),"pythonOCC-%s 3d viewer
>> ('python-xlib' backend)"%VERSION)
>> File "/Library/Python/2.6/site-packages/Xlib/display.py", line 83, in
>> __init__
>> self.display = _BaseDisplay(display)
>> File "/Library/Python/2.6/site-packages/Xlib/display.py", line 65, in
>> __init__
>> apply(protocol.display.Display.__init__, (self, ) + args, keys)
>> File "/Library/Python/2.6/site-packages/Xlib/protocol/display.py",
>> line 44, in __init__
>> name, host, displayno, screenno = connect.get_display(display)
>> File "/Library/Python/2.6/site-packages/Xlib/support/connect.py",
>> line 64, in get_display
>> mod = __import__(modname, globals())
>> File "/Library/Python/2.6/site-packages/Xlib/support/unix_connect.py",
>> line 43, in <module>
>> uname = platform.uname()
>> File
>>
"/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/platform.py",
>> line 1194, in uname
>> processor = _syscmd_uname('-p','')
>> File
>>
"/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/platform.py",
>> line 950, in _syscmd_uname
>> output = string.strip(f.read())
>> IOError: [Errno 4] Interrupted system call
>>
>> And another one:
>>
>> Traceback (most recent call last):
>> File "???", line 7, in <module>
>> File "/Users/istvancsanady/Documents/workspace/butterfly/src/pool.py",
>> line 12, in <module>
>> display, start_display, add_menu, add_function_to_menu =
init_display()
>> File "/Library/Python/2.6/site-packages/OCC/Display/SimpleGui.py",
>> line 174, in init_display
>> win = XOCCWindow(display_xlib.Display(),"pythonOCC-%s 3d viewer
>> ('python-xlib' backend)"%VERSION)
>> File "/Library/Python/2.6/site-packages/Xlib/display.py", line 83, in
>> __init__
>> self.display = _BaseDisplay(display)
>> File "/Library/Python/2.6/site-packages/Xlib/display.py", line 65, in
>> __init__
>> apply(protocol.display.Display.__init__, (self, ) + args, keys)
>> File "/Library/Python/2.6/site-packages/Xlib/protocol/display.py",
>> line 44, in __init__
>> name, host, displayno, screenno = connect.get_display(display)
>> File "/Library/Python/2.6/site-packages/Xlib/support/connect.py",
>> line 64, in get_display
>> mod = __import__(modname, globals())
>> File "/Library/Python/2.6/site-packages/Xlib/support/unix_connect.py",
>> line 43, in <module>
>> uname = platform.uname()
>> File
>>
"/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/platform.py",
>> line 1194, in uname
>> processor = _syscmd_uname('-p','')
>> File
>>
"/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/platform.py",
>> line 950, in _syscmd_uname
>> output = string.strip(f.read())
>> IOError: [Errno 4] Interrupted system call
>>
>>
>>
>> And the strangest thing: sometimes IT WORKS! If I start the app from
>> Terminal or Finder, everything works always fine... Any ideas?
>>
>> István
>
> Hi,
>
> Reading the trace, I have the feeling you're trying to use multithreading
or
> multiprocessing. It's a bad idea to call a GUI from a specific thread (the
> GUI mainloop generally conflicts with the subthread).
>
> I can't help you further without any information about the code you're
> running.
>
> Thomas
>
>
> _______________________________________________
> Pythonocc-users mailing list
> [email protected]
> https://mail.gna.org/listinfo/pythonocc-users
>
>
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