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WSGI middleware
Captures any exceptions and prints a pretty report. See the `cgitb
documentation <http://python.org/doc/current/lib/module-cgitb.html>`_
for more.
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Wraps the application in the ``cgitb`` (standard library)
error catcher.
display:
If true (or debug is set in the global configuration)
then the traceback will be displayed in the browser
logdir:
Writes logs of all errors in that directory
context:
Number of lines of context to show around each line of
source code
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