Windows logging ugly without --no-use-colors in interactive CMD

[clach04]

Seeing:

?[32mINFO?[0m:     Started server process [?[36m40080?[0m]
?[32mINFO?[0m:     Waiting for application startup.
?[32mINFO?[0m:     Application startup complete.
?[32mINFO?[0m:     Uvicorn running on ?[1mhttp://127.0.0.1:8080?[0m (Press CTRL+C to quit)
......
?[32mINFO?[0m:     Shutting down
?[32mINFO?[0m:     Waiting for application shutdown.
?[32mINFO?[0m:     Application shutdown complete.
?[32mINFO?[0m:     Finished server process [?[36m40080?[0m]

Due to vt100/ANSI escape sequences being issued.

Passing in --no-use-colors fixes this issue.

Opening discussion as issue system suggested to to that instead of opening an issue.

I can think of 2 possible options (well the 3rd would be ignore this :-p):

1. if windows then disable colors in the logging module -

   uvicorn/uvicorn/logging.py

   Line 39 in 44a3071

   if use_colors in (True, False):

2. import colorama and then enable some time before setting self.use_colors. For example, something like:

    if use_colors and sys.platform.startswith('win'):
        try:
            import colorama
            colorama.just_fix_windows_console()  # assume recent version of colorama
        except ImportError:
            use_colors = False
   

There maybe other options?

Tenuously related to #2248 - which is non-interactive