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Python Advanced Concepts
course content

Course Content

Python Advanced Concepts

Python Advanced Concepts

1. Modules and Imports
Python Project StructureUnderstanding ModulesImport StatementsUnderstanding Libraries in PythonExploring Standard LibrariesPackage Management
2. Error Handling
Basics of Error HandlingRaising ExceptionsHandling Code After ExceptionsUsing AssertionsBest Practices in Exception Handling
3. File Handling
Introduction to File HandlingReading and Writing FilesAdvanced File OperationsWorking with File PathsContext ManagersCustom Context ManagersHandling Binary Files
4. Pytest Framework
Introduction to Testing in PythonPytest FrameworkAssert StatementTest Parametrization
5. Unittest Framework
Introduction to UnittestAssert MethodsSetUp and TearDown StepsMocking TechniqueMocking in Details

bookHandling Code After Exceptions

The try, except, else, and finally clauses form a combination that handles exceptions, performs cleanup, and executes code based on whether exceptions were raised or not.

When No Exceptions Raised

The else block is executed if NO exceptions were raised in the try block. It is useful for code that must be executed if the try block did not throw an error but should not be executed if there was an error.

Example Usage


              
1234567

            
try:
    print("Trying to divide")
    result = 10 / 2
except ZeroDivisionError:
    print("Divided by zero!")
else:
    print("Division successful:", result)
copy

In this example, the else clause runs only if no ZeroDivisionError is caught in the try block.

Executing Cleanup Actions

The finally block lets you execute code, regardless of whether an exception was raised or not. This is typically used for clean-up actions.

Example Usage


              
123456789

            
try:
    print("Trying to divide")
    result = 10 / 0
except ZeroDivisionError:
    print("Divided by zero!")
else:
    print("Division successful:", result)
finally:
    print("Operation attempted.")
copy

In this scenario, the finally clause will execute regardless of whether the try block succeeds or the except block catches an exception, ensuring that the message "Operation attempted." is printed in every case.

Task

Implement a complete error handling block with try, except, else, and finally clauses. Your task is to handle a simple calculation process.

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Section 2. Chapter 3
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bookHandling Code After Exceptions

The try, except, else, and finally clauses form a combination that handles exceptions, performs cleanup, and executes code based on whether exceptions were raised or not.

When No Exceptions Raised

The else block is executed if NO exceptions were raised in the try block. It is useful for code that must be executed if the try block did not throw an error but should not be executed if there was an error.

Example Usage


              
1234567

            
try:
    print("Trying to divide")
    result = 10 / 2
except ZeroDivisionError:
    print("Divided by zero!")
else:
    print("Division successful:", result)
copy

In this example, the else clause runs only if no ZeroDivisionError is caught in the try block.

Executing Cleanup Actions

The finally block lets you execute code, regardless of whether an exception was raised or not. This is typically used for clean-up actions.

Example Usage


              
123456789

            
try:
    print("Trying to divide")
    result = 10 / 0
except ZeroDivisionError:
    print("Divided by zero!")
else:
    print("Division successful:", result)
finally:
    print("Operation attempted.")
copy

In this scenario, the finally clause will execute regardless of whether the try block succeeds or the except block catches an exception, ensuring that the message "Operation attempted." is printed in every case.

Task

Implement a complete error handling block with try, except, else, and finally clauses. Your task is to handle a simple calculation process.

Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Everything was clear?

How can we improve it?

Thanks for your feedback!

Section 2. Chapter 3
toggle bottom row

bookHandling Code After Exceptions

The try, except, else, and finally clauses form a combination that handles exceptions, performs cleanup, and executes code based on whether exceptions were raised or not.

When No Exceptions Raised

The else block is executed if NO exceptions were raised in the try block. It is useful for code that must be executed if the try block did not throw an error but should not be executed if there was an error.

Example Usage


              
1234567

            
try:
    print("Trying to divide")
    result = 10 / 2
except ZeroDivisionError:
    print("Divided by zero!")
else:
    print("Division successful:", result)
copy

In this example, the else clause runs only if no ZeroDivisionError is caught in the try block.

Executing Cleanup Actions

The finally block lets you execute code, regardless of whether an exception was raised or not. This is typically used for clean-up actions.

Example Usage


              
123456789

            
try:
    print("Trying to divide")
    result = 10 / 0
except ZeroDivisionError:
    print("Divided by zero!")
else:
    print("Division successful:", result)
finally:
    print("Operation attempted.")
copy

In this scenario, the finally clause will execute regardless of whether the try block succeeds or the except block catches an exception, ensuring that the message "Operation attempted." is printed in every case.

Task

Implement a complete error handling block with try, except, else, and finally clauses. Your task is to handle a simple calculation process.

Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Everything was clear?

How can we improve it?

Thanks for your feedback!

The try, except, else, and finally clauses form a combination that handles exceptions, performs cleanup, and executes code based on whether exceptions were raised or not.

When No Exceptions Raised

The else block is executed if NO exceptions were raised in the try block. It is useful for code that must be executed if the try block did not throw an error but should not be executed if there was an error.

Example Usage


              
1234567

            
try:
    print("Trying to divide")
    result = 10 / 2
except ZeroDivisionError:
    print("Divided by zero!")
else:
    print("Division successful:", result)
copy

In this example, the else clause runs only if no ZeroDivisionError is caught in the try block.

Executing Cleanup Actions

The finally block lets you execute code, regardless of whether an exception was raised or not. This is typically used for clean-up actions.

Example Usage


              
123456789

            
try:
    print("Trying to divide")
    result = 10 / 0
except ZeroDivisionError:
    print("Divided by zero!")
else:
    print("Division successful:", result)
finally:
    print("Operation attempted.")
copy

In this scenario, the finally clause will execute regardless of whether the try block succeeds or the except block catches an exception, ensuring that the message "Operation attempted." is printed in every case.

Task

Implement a complete error handling block with try, except, else, and finally clauses. Your task is to handle a simple calculation process.

Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Section 2. Chapter 3
Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
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