SlideShare une entreprise Scribd logo
Chapter-3
What is Exception?
Python provides two very important features to handle any unexpected error in
your Python programs and to add debugging capabilities in them:
• Exception Handling:
• Assertions:
What is Exception?
• An exception is an event, which occurs during the execution of a program, that
disrupts the normal flow of the program's instructions.
• In general, when a Python script encounters a situation that it can't cope with, it
raises an exception. An exception is a Python object that represents an error.
• When a Python script raises an exception, it must either handle the exception
immediately otherwise it would terminate and come out.
Built in Exception in Python
The raise Statement
• The raise statement can be used to throw an exception.
• The syntax of raise statement is:
raise exception-name[(optional argument)]
The assert Statement
• An assert statement in Python is used to test an expression in the
program code. If the result after testing comes false, then the
exception is raised.
• This statement is generally used in the beginning of the function or
after a function call to check for valid input.
• The syntax for assert statement is:
assert Expression[,arguments]
On encountering an assert statement, Python evaluates the expression
given immediately after the assert keyword. If this expression is false,
an AssertionError exception is raised which can be handled like any
other exception.
Example of assert statement
ch-3-exception-handling.pdf
ch-3-exception-handling.pdf
ch-3-exception-handling.pdf
ch-3-exception-handling.pdf
ch-3-exception-handling.pdf
ch-3-exception-handling.pdf
ch-3-exception-handling.pdf
ch-3-exception-handling.pdf
ch-3-exception-handling.pdf
ch-3-exception-handling.pdf
ch-3-exception-handling.pdf
ch-3-exception-handling.pdf
ch-3-exception-handling.pdf
ch-3-exception-handling.pdf
ch-3-exception-handling.pdf
ch-3-exception-handling.pdf
ch-3-exception-handling.pdf
ch-3-exception-handling.pdf

Contenu connexe

Similaire à ch-3-exception-handling.pdf

Chap2 exception handling
Chap2 exception handlingChap2 exception handling
Chap2 exception handling
raksharao
 
Java-Unit 3- Chap2 exception handling
Java-Unit 3- Chap2 exception handlingJava-Unit 3- Chap2 exception handling
Java-Unit 3- Chap2 exception handling
raksharao
 
Java Exceptions and Exception Handling
 Java  Exceptions and Exception Handling Java  Exceptions and Exception Handling
Java Exceptions and Exception Handling
MaqdamYasir
 
Exception handling3.pdf
Exception handling3.pdfException handling3.pdf
Exception handling3.pdf
Brokeass1
 
Exception handling in python
Exception handling in pythonException handling in python
ACP - Week - 9.pptx
ACP - Week - 9.pptxACP - Week - 9.pptx
ACP - Week - 9.pptx
funnyvideosbysam
 
Exception handling
Exception handlingException handling
Exception handling
pooja kumari
 
Exception handling
Exception handlingException handling
Exception handling
Abhishek Pachisia
 
Exception Handling Exception Handling Exception Handling
Exception Handling Exception Handling Exception HandlingException Handling Exception Handling Exception Handling
Exception Handling Exception Handling Exception Handling
AboMohammad10
 
Java chapter 6
Java chapter 6Java chapter 6
Java chapter 6
Abdii Rashid
 
A36519192_21789_4_2018_Exception Handling.ppt
A36519192_21789_4_2018_Exception Handling.pptA36519192_21789_4_2018_Exception Handling.ppt
A36519192_21789_4_2018_Exception Handling.ppt
promila09
 
Java Exceptions Best Practices
Java Exceptions Best PracticesJava Exceptions Best Practices
Java Exceptions Best Practices
Artur Mkrtchyan
 
Exception Handling In Java Presentation. 2024
Exception Handling In Java Presentation. 2024Exception Handling In Java Presentation. 2024
Exception Handling In Java Presentation. 2024
kashyapneha2809
 
Java-Exception Handling Presentation. 2024
Java-Exception Handling Presentation. 2024Java-Exception Handling Presentation. 2024
Java-Exception Handling Presentation. 2024
nehakumari0xf
 
Exception handling.pptx
Exception handling.pptxException handling.pptx
Exception handling.pptx
NISHASOMSCS113
 
Exception handling in JAVA
Exception handling in JAVAException handling in JAVA
Exception handling in JAVA
Kunal Singh
 
Exception handling in .net
Exception handling in .netException handling in .net
Introduction of exception in vb.net
Introduction of exception in vb.netIntroduction of exception in vb.net
Introduction of exception in vb.net
suraj pandey
 
Java SE 11 Exception Handling
Java SE 11 Exception HandlingJava SE 11 Exception Handling
Java SE 11 Exception Handling
Ashwin Shiv
 
Exception handling in java-PPT.pptx
Exception handling in java-PPT.pptxException handling in java-PPT.pptx
Exception handling in java-PPT.pptx
sonalipatil225940
 

Similaire à ch-3-exception-handling.pdf (20)

Chap2 exception handling
Chap2 exception handlingChap2 exception handling
Chap2 exception handling
 
Java-Unit 3- Chap2 exception handling
Java-Unit 3- Chap2 exception handlingJava-Unit 3- Chap2 exception handling
Java-Unit 3- Chap2 exception handling
 
Java Exceptions and Exception Handling
 Java  Exceptions and Exception Handling Java  Exceptions and Exception Handling
Java Exceptions and Exception Handling
 
Exception handling3.pdf
Exception handling3.pdfException handling3.pdf
Exception handling3.pdf
 
Exception handling in python
Exception handling in pythonException handling in python
Exception handling in python
 
ACP - Week - 9.pptx
ACP - Week - 9.pptxACP - Week - 9.pptx
ACP - Week - 9.pptx
 
Exception handling
Exception handlingException handling
Exception handling
 
Exception handling
Exception handlingException handling
Exception handling
 
Exception Handling Exception Handling Exception Handling
Exception Handling Exception Handling Exception HandlingException Handling Exception Handling Exception Handling
Exception Handling Exception Handling Exception Handling
 
Java chapter 6
Java chapter 6Java chapter 6
Java chapter 6
 
A36519192_21789_4_2018_Exception Handling.ppt
A36519192_21789_4_2018_Exception Handling.pptA36519192_21789_4_2018_Exception Handling.ppt
A36519192_21789_4_2018_Exception Handling.ppt
 
Java Exceptions Best Practices
Java Exceptions Best PracticesJava Exceptions Best Practices
Java Exceptions Best Practices
 
Exception Handling In Java Presentation. 2024
Exception Handling In Java Presentation. 2024Exception Handling In Java Presentation. 2024
Exception Handling In Java Presentation. 2024
 
Java-Exception Handling Presentation. 2024
Java-Exception Handling Presentation. 2024Java-Exception Handling Presentation. 2024
Java-Exception Handling Presentation. 2024
 
Exception handling.pptx
Exception handling.pptxException handling.pptx
Exception handling.pptx
 
Exception handling in JAVA
Exception handling in JAVAException handling in JAVA
Exception handling in JAVA
 
Exception handling in .net
Exception handling in .netException handling in .net
Exception handling in .net
 
Introduction of exception in vb.net
Introduction of exception in vb.netIntroduction of exception in vb.net
Introduction of exception in vb.net
 
Java SE 11 Exception Handling
Java SE 11 Exception HandlingJava SE 11 Exception Handling
Java SE 11 Exception Handling
 
Exception handling in java-PPT.pptx
Exception handling in java-PPT.pptxException handling in java-PPT.pptx
Exception handling in java-PPT.pptx
 

Dernier

clinical examination of hip joint (1).pdf
clinical examination of hip joint (1).pdfclinical examination of hip joint (1).pdf
clinical examination of hip joint (1).pdf
Priyankaranawat4
 
South African Journal of Science: Writing with integrity workshop (2024)
South African Journal of Science: Writing with integrity workshop (2024)South African Journal of Science: Writing with integrity workshop (2024)
South African Journal of Science: Writing with integrity workshop (2024)
Academy of Science of South Africa
 
BÀI TẬP DẠY THÊM TIẾNG ANH LỚP 7 CẢ NĂM FRIENDS PLUS SÁCH CHÂN TRỜI SÁNG TẠO ...
BÀI TẬP DẠY THÊM TIẾNG ANH LỚP 7 CẢ NĂM FRIENDS PLUS SÁCH CHÂN TRỜI SÁNG TẠO ...BÀI TẬP DẠY THÊM TIẾNG ANH LỚP 7 CẢ NĂM FRIENDS PLUS SÁCH CHÂN TRỜI SÁNG TẠO ...
BÀI TẬP DẠY THÊM TIẾNG ANH LỚP 7 CẢ NĂM FRIENDS PLUS SÁCH CHÂN TRỜI SÁNG TẠO ...
Nguyen Thanh Tu Collection
 
How to Manage Your Lost Opportunities in Odoo 17 CRM
How to Manage Your Lost Opportunities in Odoo 17 CRMHow to Manage Your Lost Opportunities in Odoo 17 CRM
How to Manage Your Lost Opportunities in Odoo 17 CRM
Celine George
 
Main Java[All of the Base Concepts}.docx
Main Java[All of the Base Concepts}.docxMain Java[All of the Base Concepts}.docx
Main Java[All of the Base Concepts}.docx
adhitya5119
 
ANATOMY AND BIOMECHANICS OF HIP JOINT.pdf
ANATOMY AND BIOMECHANICS OF HIP JOINT.pdfANATOMY AND BIOMECHANICS OF HIP JOINT.pdf
ANATOMY AND BIOMECHANICS OF HIP JOINT.pdf
Priyankaranawat4
 
How to Create a More Engaging and Human Online Learning Experience
How to Create a More Engaging and Human Online Learning Experience How to Create a More Engaging and Human Online Learning Experience
How to Create a More Engaging and Human Online Learning Experience
Wahiba Chair Training & Consulting
 
BBR 2024 Summer Sessions Interview Training
BBR  2024 Summer Sessions Interview TrainingBBR  2024 Summer Sessions Interview Training
BBR 2024 Summer Sessions Interview Training
Katrina Pritchard
 
Hindi varnamala | hindi alphabet PPT.pdf
Hindi varnamala | hindi alphabet PPT.pdfHindi varnamala | hindi alphabet PPT.pdf
Hindi varnamala | hindi alphabet PPT.pdf
Dr. Mulla Adam Ali
 
Digital Artefact 1 - Tiny Home Environmental Design
Digital Artefact 1 - Tiny Home Environmental DesignDigital Artefact 1 - Tiny Home Environmental Design
Digital Artefact 1 - Tiny Home Environmental Design
amberjdewit93
 
UGC NET Exam Paper 1- Unit 1:Teaching Aptitude
UGC NET Exam Paper 1- Unit 1:Teaching AptitudeUGC NET Exam Paper 1- Unit 1:Teaching Aptitude
UGC NET Exam Paper 1- Unit 1:Teaching Aptitude
S. Raj Kumar
 
Advanced Java[Extra Concepts, Not Difficult].docx
Advanced Java[Extra Concepts, Not Difficult].docxAdvanced Java[Extra Concepts, Not Difficult].docx
Advanced Java[Extra Concepts, Not Difficult].docx
adhitya5119
 
Beyond Degrees - Empowering the Workforce in the Context of Skills-First.pptx
Beyond Degrees - Empowering the Workforce in the Context of Skills-First.pptxBeyond Degrees - Empowering the Workforce in the Context of Skills-First.pptx
Beyond Degrees - Empowering the Workforce in the Context of Skills-First.pptx
EduSkills OECD
 
Your Skill Boost Masterclass: Strategies for Effective Upskilling
Your Skill Boost Masterclass: Strategies for Effective UpskillingYour Skill Boost Masterclass: Strategies for Effective Upskilling
Your Skill Boost Masterclass: Strategies for Effective Upskilling
Excellence Foundation for South Sudan
 
Wound healing PPT
Wound healing PPTWound healing PPT
Wound healing PPT
Jyoti Chand
 
RHEOLOGY Physical pharmaceutics-II notes for B.pharm 4th sem students
RHEOLOGY Physical pharmaceutics-II notes for B.pharm 4th sem studentsRHEOLOGY Physical pharmaceutics-II notes for B.pharm 4th sem students
RHEOLOGY Physical pharmaceutics-II notes for B.pharm 4th sem students
Himanshu Rai
 
spot a liar (Haiqa 146).pptx Technical writhing and presentation skills
spot a liar (Haiqa 146).pptx Technical writhing and presentation skillsspot a liar (Haiqa 146).pptx Technical writhing and presentation skills
spot a liar (Haiqa 146).pptx Technical writhing and presentation skills
haiqairshad
 
Walmart Business+ and Spark Good for Nonprofits.pdf
Walmart Business+ and Spark Good for Nonprofits.pdfWalmart Business+ and Spark Good for Nonprofits.pdf
Walmart Business+ and Spark Good for Nonprofits.pdf
TechSoup
 
How to Setup Warehouse & Location in Odoo 17 Inventory
How to Setup Warehouse & Location in Odoo 17 InventoryHow to Setup Warehouse & Location in Odoo 17 Inventory
How to Setup Warehouse & Location in Odoo 17 Inventory
Celine George
 
writing about opinions about Australia the movie
writing about opinions about Australia the moviewriting about opinions about Australia the movie
writing about opinions about Australia the movie
Nicholas Montgomery
 

Dernier (20)

clinical examination of hip joint (1).pdf
clinical examination of hip joint (1).pdfclinical examination of hip joint (1).pdf
clinical examination of hip joint (1).pdf
 
South African Journal of Science: Writing with integrity workshop (2024)
South African Journal of Science: Writing with integrity workshop (2024)South African Journal of Science: Writing with integrity workshop (2024)
South African Journal of Science: Writing with integrity workshop (2024)
 
BÀI TẬP DẠY THÊM TIẾNG ANH LỚP 7 CẢ NĂM FRIENDS PLUS SÁCH CHÂN TRỜI SÁNG TẠO ...
BÀI TẬP DẠY THÊM TIẾNG ANH LỚP 7 CẢ NĂM FRIENDS PLUS SÁCH CHÂN TRỜI SÁNG TẠO ...BÀI TẬP DẠY THÊM TIẾNG ANH LỚP 7 CẢ NĂM FRIENDS PLUS SÁCH CHÂN TRỜI SÁNG TẠO ...
BÀI TẬP DẠY THÊM TIẾNG ANH LỚP 7 CẢ NĂM FRIENDS PLUS SÁCH CHÂN TRỜI SÁNG TẠO ...
 
How to Manage Your Lost Opportunities in Odoo 17 CRM
How to Manage Your Lost Opportunities in Odoo 17 CRMHow to Manage Your Lost Opportunities in Odoo 17 CRM
How to Manage Your Lost Opportunities in Odoo 17 CRM
 
Main Java[All of the Base Concepts}.docx
Main Java[All of the Base Concepts}.docxMain Java[All of the Base Concepts}.docx
Main Java[All of the Base Concepts}.docx
 
ANATOMY AND BIOMECHANICS OF HIP JOINT.pdf
ANATOMY AND BIOMECHANICS OF HIP JOINT.pdfANATOMY AND BIOMECHANICS OF HIP JOINT.pdf
ANATOMY AND BIOMECHANICS OF HIP JOINT.pdf
 
How to Create a More Engaging and Human Online Learning Experience
How to Create a More Engaging and Human Online Learning Experience How to Create a More Engaging and Human Online Learning Experience
How to Create a More Engaging and Human Online Learning Experience
 
BBR 2024 Summer Sessions Interview Training
BBR  2024 Summer Sessions Interview TrainingBBR  2024 Summer Sessions Interview Training
BBR 2024 Summer Sessions Interview Training
 
Hindi varnamala | hindi alphabet PPT.pdf
Hindi varnamala | hindi alphabet PPT.pdfHindi varnamala | hindi alphabet PPT.pdf
Hindi varnamala | hindi alphabet PPT.pdf
 
Digital Artefact 1 - Tiny Home Environmental Design
Digital Artefact 1 - Tiny Home Environmental DesignDigital Artefact 1 - Tiny Home Environmental Design
Digital Artefact 1 - Tiny Home Environmental Design
 
UGC NET Exam Paper 1- Unit 1:Teaching Aptitude
UGC NET Exam Paper 1- Unit 1:Teaching AptitudeUGC NET Exam Paper 1- Unit 1:Teaching Aptitude
UGC NET Exam Paper 1- Unit 1:Teaching Aptitude
 
Advanced Java[Extra Concepts, Not Difficult].docx
Advanced Java[Extra Concepts, Not Difficult].docxAdvanced Java[Extra Concepts, Not Difficult].docx
Advanced Java[Extra Concepts, Not Difficult].docx
 
Beyond Degrees - Empowering the Workforce in the Context of Skills-First.pptx
Beyond Degrees - Empowering the Workforce in the Context of Skills-First.pptxBeyond Degrees - Empowering the Workforce in the Context of Skills-First.pptx
Beyond Degrees - Empowering the Workforce in the Context of Skills-First.pptx
 
Your Skill Boost Masterclass: Strategies for Effective Upskilling
Your Skill Boost Masterclass: Strategies for Effective UpskillingYour Skill Boost Masterclass: Strategies for Effective Upskilling
Your Skill Boost Masterclass: Strategies for Effective Upskilling
 
Wound healing PPT
Wound healing PPTWound healing PPT
Wound healing PPT
 
RHEOLOGY Physical pharmaceutics-II notes for B.pharm 4th sem students
RHEOLOGY Physical pharmaceutics-II notes for B.pharm 4th sem studentsRHEOLOGY Physical pharmaceutics-II notes for B.pharm 4th sem students
RHEOLOGY Physical pharmaceutics-II notes for B.pharm 4th sem students
 
spot a liar (Haiqa 146).pptx Technical writhing and presentation skills
spot a liar (Haiqa 146).pptx Technical writhing and presentation skillsspot a liar (Haiqa 146).pptx Technical writhing and presentation skills
spot a liar (Haiqa 146).pptx Technical writhing and presentation skills
 
Walmart Business+ and Spark Good for Nonprofits.pdf
Walmart Business+ and Spark Good for Nonprofits.pdfWalmart Business+ and Spark Good for Nonprofits.pdf
Walmart Business+ and Spark Good for Nonprofits.pdf
 
How to Setup Warehouse & Location in Odoo 17 Inventory
How to Setup Warehouse & Location in Odoo 17 InventoryHow to Setup Warehouse & Location in Odoo 17 Inventory
How to Setup Warehouse & Location in Odoo 17 Inventory
 
writing about opinions about Australia the movie
writing about opinions about Australia the moviewriting about opinions about Australia the movie
writing about opinions about Australia the movie
 

ch-3-exception-handling.pdf

  • 2.
  • 3.
  • 4.
  • 5. What is Exception? Python provides two very important features to handle any unexpected error in your Python programs and to add debugging capabilities in them: • Exception Handling: • Assertions: What is Exception? • An exception is an event, which occurs during the execution of a program, that disrupts the normal flow of the program's instructions. • In general, when a Python script encounters a situation that it can't cope with, it raises an exception. An exception is a Python object that represents an error. • When a Python script raises an exception, it must either handle the exception immediately otherwise it would terminate and come out.
  • 6.
  • 7.
  • 8. Built in Exception in Python
  • 9.
  • 10. The raise Statement • The raise statement can be used to throw an exception. • The syntax of raise statement is: raise exception-name[(optional argument)]
  • 11. The assert Statement • An assert statement in Python is used to test an expression in the program code. If the result after testing comes false, then the exception is raised. • This statement is generally used in the beginning of the function or after a function call to check for valid input. • The syntax for assert statement is: assert Expression[,arguments] On encountering an assert statement, Python evaluates the expression given immediately after the assert keyword. If this expression is false, an AssertionError exception is raised which can be handled like any other exception.
  • 12. Example of assert statement