Allow debugging without disabling output capturing

[darrenburns]

Is there a way we can disable output capturing when a debugger runs automatically?

[CodeMouse92]

I wonder if the default should be to pipe the output by default; capture, process, and then spit it out again in some formatted fashion?

[breuleux]

The behavior of breakpoint() (Python >= 3.7) can be controlled with the PYTHONBREAKPOINT environment variable, and I believe you can modify it programmatically by setting it in os.environ.

It wouldn't work for e.g. explicit calls to pdb.set_trace(), but that's falling out of usage as people move to 3.7 and 3.8, so I think it could be a reasonable start to wrap breakpoint so that it turns off capture when invoked and turns it back on when execution is resumed.

[darrenburns]

That sounds like a reasonable approach. For 3.6 users we could just provide a ward.breakpoint() function that wraps pdb.set_trace(), and can be called directly.

[darrenburns]

Made a start on this a while back: #119