TypeError when using nested bars in 2.0.0

[haukebruno]

I tried the 2.0.0 release (or release candidate) today to have nested progress bars.

My testing code is:

from time import sleep
from alive_progress import alive_bar

with alive_bar() as customer_bar:
    for customer in ['acmecorp', 'examplecorp', 'foo']:

        print('Start working on customer: ' + customer)

        with alive_bar() as action_bar:
            for action in ['setup', 'install', 'configure', 'finish']:

                print('Performing action ' + action)
                sleep(2)
                action_bar()
        
        sleep(5)
        customer_bar()

Which results in an error:

File "/Users/hauke/tmp/pybar/foo.py", line 14, in <module>
    print('Performing action ' + action)
  File "/Users/hauke/tmp/pybar/testfoo/lib/python3.9/site-packages/alive_progress/core/hook_manager.py", line 36, in write
    buffer = buffers[stream]
TypeError: unhashable type: 'types.SimpleNamespace'

Disclaimer: I'm pretty new to Python (and programming at all) 🙈

[rsalmei]

Hello @haukebruno,

There isn't support for multiple nested bars yet.
I explained this recently in #95, and there's another ticket open for a long time in #20.
Unfortunately it isn't simple, but I still would like to support that some day.

[radugrosu]

Sorry to comment on an old thread, I understand that nested bars are not supported yet, but it would be great if the application didn't crash.

[rsalmei]

No problem, man. Well, if it is not supported it has to crash somehow. You mean, perhaps with a cleaner error message?

[radugrosu]

Yes, a more specific error message would actually be great. It happened to me recently that I added a progress bar in a utility where one of the callers was also using a progress bar and the resulting crash was pretty confusing there for a minute. Thanks

[rsalmei]

Done, it will be on the next version: 3.1.3.

[radugrosu]

Thanks a lot!

[rsalmei]

You're welcome 👍