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Exception Handling in Python Video Lecture | Basics of Python - Software Development
FAQs on Exception Handling in Python Video Lecture - Basics of Python - Software Development
| 1. What is exception handling in Python? |  |
Ans.Exception handling in Python is a mechanism that allows developers to manage and respond to runtime errors or exceptions that may occur in a program. It involves using the `try`, `except`, `else`, and `finally` blocks to catch exceptions and provide a way to handle them gracefully without crashing the program.
| 2. How do you use the `try` and `except` blocks in Python? | |
Ans.To use `try` and `except` blocks in Python, you place the code that may raise an exception inside the `try` block. If an exception occurs, the code in the `except` block will execute. Here’s a simple example:
python
try:
x = 1 / 0
except ZeroDivisionError:
print("You cannot divide by zero!")
| 3. What is the purpose of the `finally` block in exception handling? | |
Ans.The `finally` block in Python is used to define a piece of code that will always execute, regardless of whether an exception was raised or not. This is useful for cleanup actions, such as closing files or releasing resources. For example:
python
try:
file = open('data.txt', 'r')
# process file
except FileNotFoundError:
print("File not found.")
finally:
file.close()
| 4. Can you catch multiple exceptions in a single `except` block? | |
Ans.Yes, you can catch multiple exceptions in a single `except` block by specifying a tuple of exception types. For example:
python
try:
x = int(input("Enter a number: "))
y = 1 / x
except (ValueError, ZeroDivisionError) as e:
print(f"An error occurred: {e}")
| 5. What is the difference between `raise` and `assert` in Python? | |
Ans.`raise` is used to manually trigger an exception, whereas `assert` is used for debugging purposes to check if a condition is true. If the condition is false, `assert` raises an `AssertionError`. For example:
python
x = -1
assert x >= 0, "x must be non-negative"
# Using raise
if x < 0:
raise valueerror("x must be non-negative")
0:="" raise="" valueerror("x="" must="" be="" non-negative")=""></ 0:
raise valueerror("x must be non-negative")
>
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Sep 02, 2025
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