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Exception Handling in Python

Introduction
Setting Up Your Python Environment
Installing Python and PyCharm IDE Creating and Running Your First Python Program
Python Data Types
Numeric Types String Types Boolean Types None Type
Operators and Expressions
Arithmetic Operators Comparison Operators Logical Operators Bitwise Operators Assignment Operators Operator Precedence
Control Flow Statements
Conditional Statements Loops Break and Continue Statements Exception Handling
Functions and Modules
Defining and Calling Functions Function Arguments and Return Values Lambda Functions Modules and Packages
Python Data Structures
Lists Tuples Dictionaries Sets Arrays
ObjectOriented Programming in Python
Classes and Objects Attributes and Methods Inheritance and Polymorphism Abstract Classes and Interfaces
File Handling
Opening and Closing Files Reading and Writing Text Files Reading and Writing Binary Files CSV Files
Regular Expressions
Basic Regular Expressions and Metacharacters Anchors and Quantifiers Grouping and Capturing Lookarounds
Datetime and Timezones
Date and Time Objects Date and Time Formatting Timezone and Daylight Saving Time Handling
Debugging and Testing
Debugging Techniques Debugging Tools in PyCharm Unit Testing with PyTest
Web Scraping with Python
Requesting Data with urllib Parsing HTML with Beautiful Soup Extracting and Storing Data
Database Handling with Python
Connecting to Databases Performing CRUD Operations Database Access with ORM (ObjectRelational Mapping)
Introduction to Data Science with Python
NumPy Pandas Matplotlib ScikitLearn
GUI Programming with Python
Creating GUI Applications GUI Toolkits (Tkinter, PyQt, wxWidgets)
Network Programming with Python
Socket Programming Creating and Running a Simple Web Server Connecting to APIs
Best Practices and Tips
Python Coding Standards Code Organization Writing Efficient Code Tips and Tricks for Python Development
Conclusion and Next Steps.

Exception Handling

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In Python, exceptions are runtime errors that occur during the execution of a program. Exception handling is the process of dealing with these errors so that the program can continue executing without crashing.

The main goal of exception handling is to catch the raised exceptions and gracefully handle them. The try-except block is commonly used in Python for exception handling.

The basic structure of a try-except block is as follows:

 
                    
try:
    # Code that might raise an exception
except ExceptionType:
    # Code to handle the exception

In this structure, we have a try block with code that might raise an exception. If an exception is raised, the except block is executed with code to handle the exception.

There are several built-in exception types in Python, such as ZeroDivisionError, IOError, and ValueError, among others. It is also possible to define custom exception types by creating our own classes.

Additionally, we can use the try-except block with multiple except blocks to handle different types of exceptions separately. We can also include an else block that executes if no exception occurs in the try block, and a finally block that always executes regardless of whether an exception occurs or not.

Overall, exception handling is an essential part of programming as it allows us to handle unexpected situations gracefully and keep our programs running smoothly.

March 25, 2023

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