Reading the bitrate of an mp3

[Lars Hoeyrup Jensen]

I'm looking for a Python module that enables me to read the bitrate and length
in minutes/seconds from _any_ mp3 file, no matter if it has an ID3 tag or not.
Does such a module exist? I know you can get it for Perl but I have only been
able to find this for Python:

http://csl.cse.ucsc.edu/~ben/python/id3.html

and it doesn't seem to give you the bitrate or length of the file.

Any help would be greatly appreciated,

Lars H. Jensen