# A couple of questions for you

**URL:** <https://www.ruby-forum.com/t/a-couple-of-questions-for-you/244464>\
**Category:** GNU Radio\
**Created:** [April 15, 2016, 11:00am UTC](https://www.ruby-forum.com/t/a-couple-of-questions-for-you/244464 "2016-04-15T11:00:45Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Rafa\_F](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/958977/32.png) [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\
**Post date:** [April 15, 2016, 11:00am UTC](https://www.ruby-forum.com/t/a-couple-of-questions-for-you/244464/1 "2016-04-15T11:00:45Z")

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Greetings all,

I recently began using GnuRadio and GRC, and I have some doubt that hope  
you can explain.

1. It is possible to modify the QT or WX GUI by adding some pushbutton.  
I know that I can add sliders, static text… but not a pushbutton. It  
would be great if I could add it where there are the others in WX (below  
‘Autoscale’ and ‘Stop/Run’) or if I could modify the properties of one  
of the existing.

2. It is possible to create a new block or to modify an existing one and  
adding it to a module already present (for example, it is possible to  
modify the block ‘File Source’ that is already present in the module  
‘File Operators’)? If so, how can I compile? Because the build directory  
is not present, I have to add it and then use cmake or is there an other  
way to operate in this case?

3. I noticed that I am not the only one facing this error, I would like  
to know if is it has been resolved in some way: when I add a new python  
block in my OOT module, I always get an error when I try to use it even  
if I did not had any error while compiling by terminal; the error is the  
following:  
AttributeError:‘module’ object has not attribute ‘MYBLOCKNAME’  
If it can help I create the first block in my OOT module using C++

Thanks in advance