Make traceback easier to see for xonsh.

Python work very often with large libraries like pandas, or matplotlib. This means that exceptions often produce long stack traces. Since we don't need to see the library detail in the vast majority of cases. Especially with a shell like xonsh.

This xontrib making readable and short traceback.

example: Simple division by zero error.

example: This simple pandas error produces a stacktrace containing 28 lines. But xontrib load...

Install using pip

pip install xontrib-readable-traceback

Write .xonshrc

xontrib load readable-traceback

This xontrib use backtrace package.

For the main usage, please refer to the following.

https://github.com/nir0s/backtrace#usage

xonshrc sample.

~~~
xontrib load readable-traceback
$READABLE_TRACE_STRIP_PATH_ENV=True
$READABLE_TRACE_REVERSE=True
~~~

The correspondence with the variable of backtrace is as follows.

For details of style please refer to backtrace#style and colorama.

If we want to turn trace off, we can use:

$XONSH_READABLE_TRACEBACK=False

If so, the notation of traceback follows xonsh_env($XONSH_SHOW_TRACEBACK).

Xonsh can keep a log of traceback.
To keep the log, write "ABSOLUTE PATH TO TRACEBACK LOG" below.

$XONSH_TRACEBACK_LOGFILE="PATH"

If it is None, no log is kept. Default is None.

Thanks

• https://github.com/xonsh/xonsh
• https://github.com/nir0s/backtrace
• https://github.com/laerus/cookiecutter-xontrib

I appreciate all Python's assets and xonsh.
If there is something problem, up to github issue.
@vaaaaanquish