[migration/pdb] add option to use pdb.post_mortem if traceback is provided
Post mortem is a mode where the pdb shell is opened **where** the exception as
occured instead at the breakpoint for set_trace. This is way more useful for
debugging for the user because is will have the full context of the error.
Closes #17219827
Tutorials
~~~~~~~~~
We present a few tutorials of different levels. The blog building
tutorial introduces one smoothly to the basic concepts.
Then there is a photo gallery construction tutorial which highlights
more advanced concepts such as unit tests, security settings,
migration scripts.
.. toctree::
:maxdepth: 1
base/index
advanced/index
tools/windmill.rst
textreports/index
dataimport/index