Question

How can you improve the accuracy of calculations in Python?

Answer 1

For precision calculation in python, use the decimal module:
http://docs.python.org/library/decimal.html

Answer 2

How do I install it or do these types of modules come with Python? I really am a novice, by the way.

Answer 3

The decimal module is built-in. Just type:
from decimal import *
or
import decimal

There are code examples on the page I linked above for how to use the functions in the module.

Answer 4

And then is it active in all of my coding after that?

Answer 5

It's active until the end of the python session. Any time you open python or run a python file, it's a new session.

You'll need to include it in each python file you want to use it in.