# CentOS 7 GR 3.7.5.1 wxPython 3.0 Ettus B210 and R820T

**URL:** <https://www.ruby-forum.com/t/centos-7-gr-3-7-5-1-wxpython-3-0-ettus-b210-and-r820t/232986>\
**Category:** GNU Radio\
**Created:** [November 8, 2014, 10:40pm UTC](https://www.ruby-forum.com/t/centos-7-gr-3-7-5-1-wxpython-3-0-ettus-b210-and-r820t/232986 "2014-11-08T22:40:47Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![addis\_a](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/c4cdca/32.png) [@addis\_a](https://www.ruby-forum.com/u/addis_a)\
**Post date:** [November 8, 2014, 10:40pm UTC](https://www.ruby-forum.com/t/centos-7-gr-3-7-5-1-wxpython-3-0-ettus-b210-and-r820t/232986/1 "2014-11-08T22:40:47Z")

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Just got this limping around.

- need CentOS/RHEL baseline for a variety of reasons
- really rather have WX as other code uses it
- pybombs did not seem to do the job
- built from gnuradio git sources
- UHD 3.7.1
- osmocore and rtl-sdr gr-osmosdr form [osmocom.org](http://osmocom.org)
- needs qwt from EPEL repository
- needs PyQwt from sourceforge
- There is a bug in GR with regard to wxPython 3.0 - it will winge about  
“m\_window” and fail in any wxgui.

wx.\_core.PyAssertionError: C++ assertion “m\_window” failed at

./src/gtk/dcclient.cpp(2041) in DoGetSize(): GetSize() doesn’t work

without window

There is a workaround for any given application here:  
[http://imyy.in/blog/?p=26](http://imyy.in/blog/?p=26)

It seems that this can be made more general by putting it the wxgui  
top\_block:: **init** itself:

$ diff -btwc …/gr-wxgui/grc/top\_block\_gui.py.orig  
…/gr-wxgui/grc/top\_block\_gui.py

\*\*\* …/gr-wxgui/grc/top\_block\_gui.py.orig Mon Jul 7 17:28:59 2014

— …/gr-wxgui/grc/top\_block\_gui.py Sat Nov 8 13:02:32 2014

* * *

\*\*\* 47,52 \*\*\*\*

— 47,53 ----

```
              self.Add = self._panel.Add

              self.GridAdd = self._panel.GridAdd

              self.GetWin = self._panel.GetWin

```

- 

```
            self.Start(False)

    def SetIcon(self, *args, **kwargs): self._frame.SetIcon(*args,

```

\*\*kwargs)

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**Author:** ![pinkfloyd24](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/p/dbc845/32.png) [@pinkfloyd24](https://www.ruby-forum.com/u/pinkfloyd24)\
**Post date:** [November 10, 2014, 5:07pm UTC](https://www.ruby-forum.com/t/centos-7-gr-3-7-5-1-wxpython-3-0-ettus-b210-and-r820t/232986/2 "2014-11-10T17:07:31Z")

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On Sat, Nov 8, 2014 at 4:39 PM, Red G. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote:

> - There is a bug in GR with regard to wxPython 3.0 - it will winge about  
> “m\_window” and fail in any wxgui.
> 
> wx.\_core.PyAssertionError: C++ assertion “m\_window” failed at
> 
> ./src/gtk/dcclient.cpp(2041) in DoGetSize(): GetSize() doesn’t work
> 
> without window
> 
> Yes, we’ve known about this but not one has submitted a patch to us to fix  
> it.

> ```
> self.GridAdd = self._panel.GridAdd
> 
> ```

Ok, that’s great that there seems to be a fix out there for the WX 3.0  
problem. Will this cause any other side effects in the applications?  
Will  
it work for WX \< 3.0?

Tom