flowgraph | model for a graph with in- and ourtports | 3D Printing library

I have found that the pycharm debugger will not stop at breakpoints set in work functions of custom python GR blocks. However, it will stop at breakpoints set in a block's constructor.

Is there a way to stop at breakpoints in a work function? I know that the function is being run because when I put print statements in the work function, I see the results of the print when the flowgraph is run.

I am trying to run GNU Radio flowgraphs (no GUI) from within a Docker container. The OS on both the host and docker image is Ubuntu 18.04. I am running GNU Radio v3.7.13.4 and UHD v3.14.0.0.

On the host I can run grcc -e flowgraph.grc and it executes as expected. When I try and run it in the Docker container it reports

I'm trying out GNU Radio (Compantion) for the first time right now, having bought an RTL SDR (the SDR SMARt from NooElec) and trying to build a simple FM radio. I have a (reasonably correct) flowgraph and Compilation runs without errors, but when I try to run it, I get the following Error:

All,

After installing the Windows 10 Subsystem for Linux (WSL) and Ubuntu 20.04, I created a flowgraph that relied on QT.

The example I followed to install WSL and GNU is: https://wiki.analog.com/resources/tools-software/linux-software/gnuradio

My Python version is 3.8.2 and my GRC version is 3.8.1.0

From the same terminal that I installed everthing, I finally launched GRC gnuradio-companion

I built a flow graph and was greeted by an error when running it. The error I receiver after building the flow graph is:

I am developing a client server network using python. I want a network that has multiple clients connected to a single server and that server will acts as client and this client is connected to multiple servers. How can I do it. I have written some function for connection and sending data Here is the code:

I get this error when I run GNU Radio Companion. Of course, the multi_rtl_source.block.yml block doesn't work and doesn't show up in the menu:

I have created a custom python sync block for use in a gnuradio flowgraph. The block tests for invalid input and, if found, raises a ValueError exception. I would like to create a unit test to verify that the exception is raised when the block indeed receives invalid input data.

As part of the python-based qa test for this block, I created a flowgraph such that the block receives invalid data. When I run the test, the block does appear to raise the exception but then hangs.

What is the appropriate way to test for this? Here is a minimal working example:

I have a Column View in SAP HANA SQL that is used in a sql procedure

I have created a simple GnuRadio flowgraph in GNU Radio Companion 3.8 where I connect a Vector Source block (with vector [1,2,3,4,5]) to a QT GUI Vector Sink. When I run the flowgraph, I see a two lines: one which goes from 1 to 5 (as expected) and one which is perfectly horizontal at zero. If I set the reference level in the sink to something other than zero (e.g., 1), that line at zero remains (in addition to a line at the reference). Additionally, the legend in the upper right corner contains Min Hold and Max Hold buttons. An example is shown below:

I have a few questions:

1. What is this line at zero? How do I get rid of it?
2. How do I get rid of the Min and Max Hold options in the upper right of the plot?
3. In general, is it true that finer control of the formatting of plots in GNURadio is possible when explicitly writing code (say in a python-based flowgraph) to render the plot instead of using companion?