pi = 'foobar'

print(__name__)

name: python3

---

(oop_intro)=

(oop_names)=

```{raw} jupyter

<div id="qe-notebook-header" align="right" style="text-align:right;">

<a href="https://quantecon.org/" title="quantecon.org">

</div>

```

<style>

.auto {

width: 100%;

height: auto;

}

</style>

# OOP I: Names and Namespaces

```{contents} Contents

:depth: 2

```

## Overview

This lecture is all about variable names, how they can be used and how they are

In addition, you will save yourself many hours of debugging if you have a good

understanding of how names work in Python.

(name_res)=

(var_names)=

## Variable Names in Python

```{index} single: Python; Variable Names

</div>

```

<style>

.auto {

width: 100%;

height: auto;

}

</style>

# OOP I: Names and Objects

```{contents} Contents

:depth: 2

```

## Overview

The traditional programming paradigm (think Fortran, C, MATLAB, etc.) is called [procedural](https://en.wikipedia.org/wiki/Procedural_programming).

```

(mutable_vs_immutable)=

### {index}`Mutable <single: Mutable>` Versus {index}`Immutable <single: Immutable>` Parameters

(mutable_vs_immutable2)=

### {index}`Mutable <single: Mutable>` versus {index}`Immutable <single: Immutable>` parameters

This is a good time to say a little more about mutable vs immutable objects.

def g(x):

a = 1

x = x + a

return x

a = 0

y = g(10)

print("a = ", a, "y = ", y)