Question

How to use random() function?

Answer 1

Here is what I used to figure it out:

python docs
http://docs.python.org/library/random.html

examples of use
http://docs.python.org/tutorial/stdlib.html
http://effbot.org/librarybook/random.htm

Answer 2

When you get stuck on stuff like this Google search is your best friend. Try searches like

python rand() example
python rand() docs
or even
How do I use the python rand() function?

just make sure that you put python first in the search and you will get more relevant links.