Book Image

Learn Python in 7 Days

Book Image

Learn Python in 7 Days

Overview of this book

Python is a great language to get started in the world of programming and application development. This book will help you to take your skills to the next level having a good knowledge of the fundamentals of Python. We begin with the absolute foundation, covering the basic syntax, type variables and operators. We'll then move on to concepts like statements, arrays, operators, string processing and I/O handling. You’ll be able to learn how to operate tuples and understand the functions and methods of lists. We’ll help you develop a deep understanding of list and tuples and learn python dictionary. As you progress through the book, you’ll learn about function parameters and how to use control statements with the loop. You’ll further learn how to create modules and packages, storing of data as well as handling errors. We later dive into advanced level concepts such as Python collections and how to use class, methods, objects in python. By the end of this book, you will be able to take your skills to the next level having a good knowledge of the fundamentals of Python.
Table of Contents (18 chapters)
Title Page
Credits
About the Authors
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface
2
Type Variables and Operators

Exceptions


Consider you have created a program calc.py and that it is running successfully. After some time, a third person edits the program calc.py. While executing the program, the interpreter throws some error. Due to the error, the whole program stops working. How can we avoid this situation, where, if any error occurs, then the whole program execution does not suffer?

The answer is simple: just use exception handling. Errors detected during execution are called exceptions. In the next section, you will see the example in detail, where we will see how to use exception handling with the try...except clause. 

The try statement with an except clause

In this section, you will see how to use the try...except block to handle the exceptions. Let's understand the usage of the try...except block with examples.

Consider the following program:

def sum1(a,b):
            c = a+b
            return c
print sum1(10,0)

Consider that a third person edits the program calc.py; the full program is shown here...