On Saturday, June 30, 2018 at 6:02:06 PM UTC-4, T Berger wrote:
> On Friday, June 29, 2018 at 7:00:15 PM UTC-4, Cameron Simpson wrote:
>
> > The key point here from Jim is "simultaneously". Are you properly shutting
> > down
> > the Flask instance in IDLE before running from Terminal, and vice versa?
>
> Cameron, I try every option to quit either program, but they don't work. Or I
> should say, they mostly don't work. Once in a while they do. The one option
> which works (which is not a feasible option) is rebooting my Mac (actually
> that might not work either. I think I got the error message again this
> morning when I rebooted).
>
> > Otherwise both will try to use the same local port and There Can Be Only
> > One.
> >
> > Do you need to run from both environments at the same time? I'd have
> > thought
> > not, which also leads me to: why are you flicking from IDLE to Terminal? I
> > would have imagined using one or the other normally, not both. It isn't
> > wrong
> > to use both, just surprising.
>
> I'm working from a Python manual. I created the webapp in IDLE, and test it
> in Terminal, per the instructions in the manual. I use IDLE to edit my
> program, and then test it in terminal. When I go from one to the other, I get
> the error message. IDLE has a keyboard shortcut for quitting the shell—Cntl +
> C—but it doesn't work. Neither does restarting the shell. Neither does
> entering the kill command line, not in IDLE or terminal.
>
> Do you have any other suggestions? I'm going to email the writer. He doesn't
> mention how to deal with problems that might arise from working with two
> programs at the same time. Maybe Cntl+C should do it, but in my case it
> doesn't.
>
> Tamara
Cameron, I'd like to add screenshots of my idle and terminal windows. Perhaps
this would shed light on my this issue.
This is my last window in terminal:
[Restored Jul 2, 2018, 1:12:09 PM]
Last login: Mon Jul 2 10:58:54 on ttys000
Restored session: Mon Jul 2 11:04:19 EDT 2018
192:Webapp TamaraB$ exit
logout
Saving session...
...saving history...truncating history files...
...completed.
[Process completed]
~~~~
To me this looks like the program running in terminal has been killed.
Now this is my idle shell:
RESTART: /Users/TamaraB/Desktop/Webapp/vsearch4web.py
* Serving Flask app "vsearch4web" (lazy loading)
* Environment: production
[31m WARNING: Do not use the development server in a production
environment.[0m
[2m Use a production WSGI server instead.[0m
* Debug mode: on
Traceback (most recent call last):
File "/Users/TamaraB/Desktop/Webapp/vsearch4web.py", line 26, in <module>
app.run(debug=True)
File
"/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/flask/app.py",
line 943, in run
run_simple(host, port, self, **options)
File
"/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/werkzeug/serving.py",
line 795, in run_simple
s.bind(get_sockaddr(hostname, port, address_family))
OSError: [Errno 48] Address already in use
>>>
Why should there be an error in idle? It's the only app running.
I emailed the writer of the manual I'm using, but who knows if, or when, he'll
reply. So any help you provide would be great.
Thanks,
Tamara
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