[Tutor] Formatting Numbers as Strings 33000.50 -> 33,000.50 ?

[Jethro Cramp]

Thanks for everyone's help in sorting out the problems I was having with
floating point numbers.

Now I have all my numbers and all the calculations done I would like to
format the output for example if I have the numbers:

3306525.45 and 510575.98

I would like to format them as:

3,306,525.45 and 510,575.98

Now I could roll my own formatter but I am sure that this is such a common
task that it must have be a standard feature/module of python. Unfortunately
I lost my copy of New Riders Python Reference a few weeks ago and I can't
find something specifically in the Python Documentation (should one of the
options for % work?) so I am flailing in the dark.

Any and all suggestions much appreciated.

Jethro