Book Image

Python Fundamentals

By : Ryan Marvin, Mark Nganga, Amos Omondi
Book Image

Python Fundamentals

By: Ryan Marvin, Mark Nganga, Amos Omondi

Overview of this book

After a brief history of Python and key differences between Python 2 and Python 3, you'll understand how Python has been used in applications such as YouTube and Google App Engine. As you work with the language, you'll learn about control statements, delve into controlling program flow and gradually work on more structured programs via functions. As you settle into the Python ecosystem, you'll learn about data structures and study ways to correctly store and represent information. By working through specific examples, you'll learn how Python implements object-oriented programming (OOP) concepts of abstraction, encapsulation of data, inheritance, and polymorphism. You'll be given an overview of how imports, modules, and packages work in Python, how you can handle errors to prevent apps from crashing, as well as file manipulation. By the end of this book, you'll have built up an impressive portfolio of projects and armed yourself with the skills you need to tackle Python projects in the real world.
Table of Contents (12 chapters)
Python Fundamentals
Preface

Booleans


Boolean data types are values that can only be one of two values, True or False. For example, the proposition 100 is more than 5 is True, and thus, it would have a True Boolean value. On the other hand, the proposition The sky is green is False, and thus, it would have a False Boolean value.

Booleans are largely associated with control statements, as they change the flow of the program, depending on the truthfulness of the specified quantities.

In Python, True and False are used to represent the two Boolean constants:

>>> True 
True
>>> False
False
>>> print(type(True), type(False))
<class 'bool'> <class 'bool'>

We can see that the type of each expression is bool (short for Boolean). Like all other types, Booleans have operators that you can apply.

Comparison Operators

Comparison operators compare the values of objects or the objects, identities themselves. The objects don't need to be of the same type. There are eight comparison operators in Python...