ANN: PyChecker v0.8.8

Neal Norwitz neal at
Sun Jan 13 19:06:56 CET 2002

Since it's been so long since the last release of PyChecker (8 days!), 
a new version of PyChecker is available for your hacking pleasure.

        PyChecker is a tool for finding bugs in python source code.
        It finds problems that are typically caught by a compiler for less
        dynamic languages, like C and C++.  It is similar to lint.

Comments, criticisms, new ideas, and other feedback is welcome.

Many features and bug fixes are in this release.  There are no
outstanding bugs on Source Forge (and only 1 feature request).
The feature request is lonely, so this release should spur
a flurry of bugs and features. :-)  Even the TODO list is shorter.

There is only one known problem which is documented in the KNOWN_BUGS file.
I don't believe this problem is too common.

One new feature which I believe is quite important to point out is:

  * Allow pychecker to be imported (in your code do: import pychecker.check)

This means that in your main program, if you make the first line (before
any other imports):

	import pychecker.check

PyChecker will install an __import__() function and will check every
module that gets imported after itself.  The warnings are printed
to stdout (the console).  (from pychecker import check probably also works.)

The README/web page below has a little more detail.

Let me know how it goes.  Good Luck!

Changes from 0.8.7 to 0.8.8:

  * Add -F/--config option to specify pycheckrc file to use
        Always read $HOME/.pycheckrc, .pycheckrc, and -F options in that order
  * Add -0/--abstract option to warn that subclass should override
        a base class whose method(s) only raise exceptions
  * Add -6/--exec option to warn when using the exec statement
  * Add -7/--slots option to warn about __slots__ usage problems
  * Add --emptyslots option to warn about empty __slots__
  * Add check if __getattr[ibute]__ returns None, should raise an exception
  * Allow pychecker to be imported (in your code do: import pychecker.check)
  * Using vars() for format string argument works like locals()
  * Make unusedNames a prefix, so emptyVal, unusedVal, etc are also ignored
  * Fix -a/--initattr warning to actually warn when attributes 
        are set outside of __init__(), but not in __init__()
  * Fix case where an implicit return did not generate a warning
  * Fix spurious warnings when using nested scopes, code should be checked now
  * Fix spurious warnings for unreachable code (not enough to enable, yet)
  * Fix spurious warnings for integer division from:  (x + 100.0) / 10
  * Fix spurious warnings for implicit returns when raise in except: clause
  * Fix various spurious warnings when using Python 2.2
  * Fix spurious warning for overridden method mismatch when using exec
  * Fix spurious warning when doing len(filter(lambda x: ..., ...))
  * Fix spurious warnings from some from ... import ... and deriving classes

PyChecker is available on Source Forge:
    Web page: 
    Project page:

pychecker at

More information about the Python-list mailing list