In this chapter, we will learn how to write simple functions such as estimation of the present value for a given future value, the present value of an annuity, and the monthly payment of our mortgage. In addition, we will show how to combine two dozens of small functions as a big Python program and use it for financial estimation. In other words, we plan to create a financial calculator using Python.
In particular, we will cover the following topics:
Writing a Python function without saving it
Why indentation is critical in Python
Three ways to input values and a default value for an input variable
Using
dir()to check the existence of our newly generated functionSaving our
pv_f()functionActivating our function from our Python editor using
import()While debugging a program, activate your program from a Python editor
import test01versusfrom test01 import *Removing a function using the
del()methodGenerating our own module
Two types of comments...