Describe PyChecker here.
from http://pychecker.sourceforge.net
PyChecker is a ["static source analysis"] 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. Because of the dynamic nature of python, some warnings may be incorrect; however, spurious warnings should be fairly infrequent.
Also read [http://www.unixreview.com/documents/s=2426/uni1018986621203/0204h.htm this article at unixreview.com] (Is Pychecker really a Favorite of Guido's ??)