Can't find PyQt4.Qwt5

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1

I’m making much more progress on my embedded x86_64 gnuradio project.
I am now able to build and run my grc-created python app, but I get
this error. I’m using some counter/sliders from Qwt (Qt GUI Range
block) to be able to change some values interactively. However, I
don’t seem to have PyQt4.Qwt5, and furthermore, I can’t seem to figure
out how to build/install it. I have found the source, of course,
(sourceforge) but not any openembedded recipes for it. Furthermore,
it seems to be part of the PyQt4 package, and I don’t see any
reference to a Qwt module within the python-pyqt package.

./my_gui.py

Traceback (most recent call last):
File “./my_gui.py”, line 30, in
import PyQt4.Qwt5 as Qwt

ImportError: No module named Qwt5

Thanks in advance for any advice.

-Chris

–
Life is like Linux - it never stands still.

2

On 02/09/2015 05:08 AM, Chris H.inan wrote:

./my_gui.py

Traceback (most recent call last):
File “./my_gui.py”, line 30, in
import PyQt4.Qwt5 as Qwt

ImportError: No module named Qwt5

Thanks in advance for any advice.

Make a recipe for PyQwt. Sadly this isn’t easy.

The PyQt4 recipe in dizzy isn’t 100%, but the one in master should be.

There is also a long term support issue with PyQwt and qt5, so it sounds
like we need to figure out how to replace Qwt eventually. Tom R. knows
the details.

Philip

3

On Mon, Feb 9, 2015 at 8:34 AM, Philip B. [email protected]
wrote:

Make a recipe for PyQwt. Sadly this isn’t easy.

The PyQt4 recipe in dizzy isn’t 100%, but the one in master should be.

There is also a long term support issue with PyQwt and qt5, so it sounds
like we need to figure out how to replace Qwt eventually. Tom R. knows
the details.

Philip

PyQWT has refused to move to QWT6, so it’s still stuck on QWT5’s API.
The
good thing is that this actually interacts fine with QWT6 for what
little
we use PyQWT for, but the installation process for PyQWT is awkward (at
best, most would say awful). We have this issue in OE and OS X macports
right now.

We’re talking about how to remove the dependency and replace it with
something more usable and less likely to fall apart.

Tom

4

On Mon, Feb 9, 2015 at 8:56 AM, Chris H.inan [email protected]
wrote:

out how to build/install it. I have found the source, of course,
ImportError: No module named Qwt5

Chris

Yeah, don’t do that, regardless of what Philip says :slight_smile:

You might be able to create your own QTGUI Range block that uses
straight-up QT instead of QWT.

http://qt-project.org/doc/qt-4.8/widgets-sliders.html

For that, just look into gr-qtgui/grc/qtgui_range.xml and see about
converting that (maybe making a secondary block for it) that calls just
the
QT slider stuff directly.

Tom

5

On Mon, Feb 9, 2015 at 8:53 AM, Tom R. [email protected] wrote:

it seems to be part of the PyQt4 package, and I don’t see any
Thanks in advance for any advice.

PyQWT has refused to move to QWT6, so it’s still stuck on QWT5’s API. The
good thing is that this actually interacts fine with QWT6 for what little we
use PyQWT for, but the installation process for PyQWT is awkward (at best,
most would say awful). We have this issue in OE and OS X macports right now.

We’re talking about how to remove the dependency and replace it with
something more usable and less likely to fall apart.

Then I think my best option is to find a way to not use it. :wink:
I did start hacking on a PyQwt recipe in the early morning hours, and
realized I was in over my head!

Thanks,

Chris

–
Life is like Linux - it never stands still.