Re: gr-gpredict-doppler / 'gpredict' has no attribute 'doppler'

[Tom Breyer]

Hi Marcus,

here is some info about my system as you asked for:

Python 3.9.1 (default, Dec  8 2020, 07:51:42)

[GCC 10.2.0] on linux
>>> import gpredict
>>> print(gpredict.__file__)
/usr/local2/lib/python3/dist-packages/gpredict/__init__.py

That is ok for my configuration I think. I installed the newest version
but get the error again, even in the examples directory.

Then I deleted all .py files and the directory __pycache__and at the
moment it works.

I am wondering about the cause and will inform you again when there is a
more reproducible situation.

73, Tom



On 27.02.21 15:55, Marcus Müller wrote:
> Hi Tom,
>
> 1. Make sure your gr-gpredict-doppler checkout is recent enough to include 
> Mike's 3.9-porting.
> Then: This error typically happens when you think you've imported something 
> that contains
> a symbol, but didn't. In case of a C++ module, I'd assume there was something 
> in the
> bindings missing, but as gr-gpredict-doppler is python only, and doppler.py is 
> right
> there, my guess is you're accidentally importing an older installation or 
> something else.
> open your python3, type in "import gpredict", then enter, then 
> "print(gpredict.__file__)".
> Is that what you're hoping it is?
>
>
> Best regards,
> Marcus
>
> On 27.02.21 14:15, Tom Breyer wrote:
> > Hi to all,
> >
> > I work with grc 3.9.0.0 und linux Debian 11.
> >
> > Since the last days I am trying to find out some very mystic (in my eyes):
> >
> > I created a very simple flowgraph with
> >
> > Error:
> >
> > File "/home/tom/grc-data-3.9/gr-gpredict-doppler/examples/gpredict.py", line 
> > 81, in __init__
> >      self.gpredict_doppler_0 = gpredict.doppler('127.0.0.1', 4532, True)
> > AttributeError: type object '*gpredict' has no attribute 'doppler'*
> >
> > --------------------------------------------------------
> >
> > But:
> >
> > I want to get gr_predict-doppler running and it works, even it can communicate 
> > with the
> > GPredict satellite program.
> >
> > --------------------------------------------------------
> >
> > This works:
> >
> > Generating: 
> > '/home/tom/grc-data-3.9/gr-gpredict-doppler/examples/test_doppler.py'
> >
> > Executing: /usr/bin/python3 -u
> > /home/tom/grc-data-3.9/gr-gpredict-doppler/examples/test_doppler.py
> >
> > [doppler] Waiting for connection on: 127.0.0.1:4532
> > [doppler] Connected from: 127.0.0.1:46078
> > [doppler] New frequency: 145826597
> > [doppler] New frequency: 145826598
> > [doppler] New frequency: 145826599
> >
> > --------------------------------------------------------
> >
> > When starting the same flowgraph in my regular working directory I get an error:
> >
> > Generating: '/home/tom/grc-data-3.9/test_doppler.py'
> >
> > Executing: /usr/bin/python3 -u /home/tom/grc-data-3.9/test_doppler.py
> >
> > Traceback (most recent call last):
> >    File "/home/tom/grc-data-3.9/test_doppler.py", line 210, in <module>
> >      main()
> >    File "/home/tom/grc-data-3.9/test_doppler.py", line 188, in main
> >      tb = top_block_cls()
> >    File "/home/tom/grc-data-3.9/test_doppler.py", line 136, in __init__
> >      self.gpredict_doppler_0 = gpredict.doppler('127.0.0.1', 4532, True)
> > AttributeError: module '*gpredict' has no attribute 'doppler'*
> >
> > --------------------------------------------------------
> >
> > When moving it again to ...examples it works again.
> >
> > I find out that maybe the directory __pycache__ can have an impact on my 
> > trials...
> >
> > What is wrong in my setup (or thinking)?
> >
> > 73, Tom