parsing tables with beautiful soup?

[cjl]

I am learning python and beautiful soup, and I'm stuck.

A web page has a table that contains data I would like to scrape. The
table has a unique class, so I can use:

soup.find("table", {"class": "class_name"})

This isolates the table. So far, so good. Next, this table has a
certain number of rows (I won't know ahead of time how many), and each
row has a set number of cells (which will be constant).

I couldn't find example code on how to loop through the contents of
the rows and cells of a table using beautiful soup. I'm guessing I
need an outer loop for the rows and an inner loop for the cells, but I
don't know how to iterate over the tags that I want.  The beautiful
soup documentation is a little beyond me at this point.

Can anyone point me in the right direction?

thanks again,
cjl