Python Code Auditing Tool

[Roy Smith]

In article <mailman.1759.1107360282.22381.python-list at python.org>,
System Administrator  <skip at pobox.com> wrote:
>
>    >> Does anybody know of a tool that can tell me all possible exceptions
>    >> that might occur in each line of code?  What I'm hoping to find is
>    >> something like the following:
>
>    Paul> That is impossible.  The parameter to the raise statement is a
>    Paul> class object, which can be anything.
>
>Sure, but in all but the rarest of cases the first arg to raise is a
>specific exception, probably one of the standard exceptions.  In the Python
>code in the distribution (ignoring the test directory where all sorts of
>mischief is done to stress things), here are the most common words following
>"raise" where "raise" is the first word on the line:
>
>    % find . -name '*.py' \
>    > | egrep -v '\./test' \
>    > | xargs egrep '^ *raise ' \
>    > | awk '{print $3}' \
>    > | sed -e 's/[(,].*//' \
>    > | sort \
>    > | uniq -c \
>    > | sort -rn \
>    > | head -15
>     246 ValueError
>     227 aetools.Error
>     216 Error
>     124 TypeError
>     101 error
>      75 RuntimeError
>      53 IOError
>      36 NotImplementedError
>      36 ImportError
>      36 EOFError
>      31 SyntaxError
>      23 KeyError
>      23 AttributeError
>      22 DistutilsPlatformError
>      21 UnicodeError

It's kind of interesting (scarry?) that in roughly 20% of the cases
nothing more specific than Error is raised.