• +91-9142290450

  • Hajipur, Bihar, 844101

☰
❮
❯

Python Try....Except

← Previous Next →

Python uses try...except blocks to handle errors gracefully. Instead of crashing the program, you can catch and manage errors during execution.

🔹 Basic Try...Except

try:
    x = 10 / 0
except:
    print("An error occurred")

✅ Output: An error occurred
This prevents the program from crashing due to division by zero.

🔹 Catch Specific Exception

You can catch specific types of errors like ZeroDivisionError, ValueError, etc.

try:
    num = int("abc")
except ValueError:
    print("Invalid input")

🔹 Multiple Except Blocks

Handle different exceptions separately:

try:
    x = int("10")
    y = 10 / 0
except ValueError:
    print("Invalid conversion")
except ZeroDivisionError:
    print("Can't divide by zero")

🔹 Try...Except...Else

The else block runs if no exception occurs.

try:
    x = 5 + 3
except:
    print("Error")
else:
    print("No error occurred")

🔹 Try...Except...Finally

The finally block always runs — whether there's an error or not.

try:
    f = open("data.txt")
except:
    print("File not found")
finally:
    print("Done")

🔹 Raise an Exception

Use raise to trigger an exception manually.

x = -5
if x < 0:
    raise ValueError("Negative value not allowed")

Practice Questions

Q1. Write a Python program to catch a ZeroDivisionError and print a friendly message.

Q2. Write a Python program to use try...except to handle input that can’t be converted to an integer.

Q3. Write a Python program to open a missing file and handle the FileNotFoundError.

Q4. Write a Python program to create a function that raises a ValueError when the input is negative.

Q5. Write a Python program to use try...except...else to show a message when no error occurs.

Q6. Write a Python program to print "Always runs" using a finally block.

Q7. Write a Python program to catch both IndexError and KeyError in separate except blocks.

Q8. Write a Python program to use raise to stop execution if a variable is empty.

Q9. Write a Python program to nest try-except blocks and handle errors at both levels.

Q10. Write a Python program to use a try block to take input and a finally block to always close the process or display a message.

← Previous Next →

Python

online coding class codepractice

Introduction to Python

Python Basics

Cotrol Structures

Data Structures

Date and Time

Functions and Module

File Handling

Python OOP

Advanced Concepts

Python DSA

Searching Algorithms

Sorting Algorithms

codepractice logo
Login
Go Back Top