I think I've made some progress on this. I posted a bug report (
https://github.com/leo-editor/leo-editor/issues/155 ) that I believe is
related but I don't know how to fix either one.
My discovery came from doing some experiments with a stand alone ipython qt
console. I believe these issues are coming from using the Qt API v1 versus
the v2 ( think it should always be using v2).
If you:
import PyQt4
%gui qt
import PyQt4
---------------------------------------------------------------------------
ImportError Traceback (most recent call last)
<ipython-input-3-0c3b8c686717> in <module>()
----> 1 import PyQt4
C:\Anaconda\lib\site-packages\IPython\external\qt_loaders.pyc in
load_module(self, fullname)
45 Importing %s disabled by IPython, which has
46 already imported an Incompatible QT Binding: %s
---> 47 """ % (fullname, loaded_api()))
48
49 ID = ImportDenier()
ImportError:
Importing PyQt4 disabled by IPython, which has
already imported an Incompatible QT Binding: pyqtv1
The second import will fail.
I found a lead on,
http://cyrille.rossant.net/making-pyqt4-pyside-and-ipython-work-together/ which
contains the following code snippit:
import sip
try:
sip.setapi('QDate', 2)
sip.setapi('QDateTime', 2)
sip.setapi('QString', 2)
sip.setapi('QtextStream', 2)
sip.setapi('Qtime', 2)
sip.setapi('QUrl', 2)
sip.setapi('QVariant', 2)
except ValueError, e:
raise RuntimeError('Could not set API version (%s): did you import
PyQt4 directly?' % e)
Now if in the stand alone if I run:
import PyQt4
import sip
try:
sip.setapi('QDate', 2)
sip.setapi('QDateTime', 2)
sip.setapi('QString', 2)
sip.setapi('QtextStream', 2)
sip.setapi('Qtime', 2)
sip.setapi('QUrl', 2)
sip.setapi('QVariant', 2)
except ValueError, e:
raise RuntimeError('Could not set API version (%s): did you import
PyQt4 directly?' % e)
%gui qt
import PyQt4
Both imports succeed.
Two things, I wouldn't know where to add Cyrille's code snippet and I'm
also not sure what the "%gui qt" magic is doing programmatically. I will
also add this finding to the bug report.
If anyone has any thoughts on making sure the v2 API is loaded please let
me know.
On Friday, March 13, 2015 at 12:40:03 PM UTC-4, john lunzer wrote:
>
> I make heavy use of a library called PyQtGraph. I am trying to:
>
> import pyqtgraph as pg
>
> But in the Leo IPython qtconsole I am getting:
>
> import pyqtgraph as pg
>
> ---------------------------------------------------------------------------
> Exception Traceback (most recent call last
> )
> <ipython-input-1-e5a51b506085> in <module>()
> ----> 1 import pyqtgraph as pg
>
>
> C:\Anaconda\lib\site-packages\pyqtgraph\__init__.py in <module>()
> 11 ## 'Qt' is a local module; it is intended mainly to cover up the
> differences
> 12 ## between PyQt4 and PySide.
> ---> 13 from .Qt import QtGui
> 14
> 15 ## not really safe--If we accidentally create another
> QApplication, the process hangs (and it is very difficult to trace the
> cause)
>
>
> C:\Anaconda\lib\site-packages\pyqtgraph\Qt.py in <module>()
> 30 USE_PYSIDE = True
> 31 except ImportError:
> ---> 32 raise Exception("PyQtGraph requires either PyQt4 or
> PySide; neither package could be imported.")
> 33
> 34 if USE_PYSIDE:
>
>
> Exception: PyQtGraph requires either PyQt4 or PySide; neither package
> could be imported.
>
> I have also cross posted to the pyqtgraph developer's google group.
>
> I found that if I attempt the same import in a standalone IPython
> QtConsole window using the "--gui=qt" tag I get the same error, so I'm
> wondering if Leo uses the same tag. And possibly how we can get around it.
>
> I'm very excited by what Leo has to offer, specifically using clones.
>
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