Counter Attempt to Format the desc and unit Arguments

[ZivRonen]

Describe the bug
Enlighten Counter try to format the description/unit fields - it will cause issues if '{' or '}' are present, in most cases raising ValueError.
This happen in both progress bar and counter modes.

To Reproduce

"""
Progress bar
"""
import enlighten
with enlighten.Counter(total=1, desc='A{') as pbar:
    pass

"""
Raw counter
"""
import enlighten
with enlighten.Counter(unit='B}') as pbar:
    pass

Environment (please complete the following information):

• Enlighten Version: 1.10.1
• OS and version: Windows 10
• Console application: Cmd/PowerShell/Pycharm
• Special Conditions: No

Additional context
N/A

[avylove]

This is because Enlighten uses str.format() internally to do variable substitution. To escape a curly brace, you need to double it.

with enlighten.Counter(total=1, desc='A{{') as pbar:
    pass

Let me know if that resolves your issue.
This should probably be in the FAQ.

[ZivRonen]

Yes. I just thought it can be solved in the library, or at least be documented (if it was, I missed it).

Note: In my case the values are generated dynamically (os.walk of an unknown client) so I used:

with enlighten.Counter(total=1, desc=path.replace('{', '{{').replace('}', '}}')) as pbar:
   pass

which solved the issue for me.

Thanks for the quick response

P.S:
If you want, I can create a pull request to solve this more generally by perform format twice.
It will however slow the run a little, and will change the behavior as '{0}' will no longer be replaced in the description/unit (which I assume is unintentional, but I am not sure)

[avylove]

I just pushed a commit to take care of it. Let me know if it works for you. It would probably still be a good idea to add tests to protect against regression.

[ZivRonen]

Checked it on my sample and it worked great!
Also checked the code and it looked fine to me, I don't see a real case that someone will use the new place holder by mistake :)

[avylove]

Released in 1.10.2

[ZivRonen]

Thank you!