ScanErrLog is a Python module that allows you to
parse Apache error_log files and present their
data in decreasing order of occurences of error
messages. This is particularly useful if you want
to quickly solve the most annoying problems Web
visitors encounter on your site. You can use it
directly from the command line, import it into
another Python program and use the classes it
defines, or use it as a CGI script. You can
produce reports in HTML, PDF, XML, or Plain Text
formats.