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Re: Import Block "bad import syntax"

From: Barry Duggan
Subject: Re: Import Block "bad import syntax"
Date: Wed, 11 Nov 2020 09:46:38 -0600
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0

Hi Jim,

1) Have you done https://wiki.gnuradio.org/index.php/TutorialPythonFunctions with the changes I suggested? Did it work?

2) Did you create ~/gr-softrock in the same manner as that tutorial?

3) What is your module going to do? Is it just an audio input from a USB dongle such as the 'Plugable USB Audio Adapter' I use on my rPi? If so, you can use the Audio Source block with the appropriate device name for the USB device. Look at https://wiki.gnuradio.org/index.php/Simulation_example:_AM_transmitter_and_receiver#AM_transmitter for an example.

4) Otherwise, it would probably be a lot simpler to use an Embedded Python Block (https://wiki.gnuradio.org/index.php/Embedded_Python_Block) for your softrock_usb.py program.

Keep me posted.

P.S. If you 'reply all' it will get included in the Discuss Gnuradio thread.
Barry Duggan KV4FV

On 11/10/20 9:46 PM, Elmore Family wrote:

Nice to be in touch with a fellow ham.

I am using 3.7.5 loaded using apt-get install.

I have been through the OOT tutorial, built the module in the tutorial as a test. Also, added some code to it to communicate with the Softrock via USB.

However, I can't accomplish much more. Using a noblock module I think will solve my problem.

But back to the basic question - how is import softrock bad syntax?


-----Original Message----- From: Barry Duggan
Sent: Tuesday, November 10, 2020 10:22 PM
To: wa4ywm@comcast.net
Cc: Discuss Gnuradio
Subject: Re: Import Block "bad import syntax"

Hi Jim,

The tutorial you cited has been deprecated in GR 3.8. Also, it doesn't
work as written! At this point we have chosen not to update or correct
it. The recommended tutorial is

What version of GR do you have on your rPi, and how did you load it?

For the tutorial you referenced, your Import should be for testpy and
not squareme. Also, for the Variable test_var, the value should be
squareme(12) without the "testpy." in front of it.

Barry Duggan KV4FV

On Mon, 9 Nov 2020 10:13:53 -0500, Elmore's wrote:

I have a problem as indicated in the subject line that has me totally

I have created a noblock module with gr_modtool called softrock. This
module has been successfully created and lives in
/usr/local/lib/python2.7/dist-packages/softrock. It contains a file

I have an existing flowgraph in which I select an Import block. In the
Import line in Properties I type “import softrock” (without quotes). I
get the error “bad import syntax”.

I used the document TutorialPythonFunctions from the gnuradio wiki as
guidance for this task.

I have performed extensive searching for this issue but everything
points back to simply adding the word “import” in front of the module name.

I have tried completely clearing the text box thinking that there might
be extraneous characters present.

This seems so simple that I am baffled why it isn’t working.

My platform is a Raspberry Pi 3 with Raspbian Jessie.

Thanks for any help you might give me.


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