50. Handling Exceptions

1. Introduction

Exceptions are errors that occur during execution. Python provides try/except blocks to handle them gracefully.

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2. Basic try-except

try:
    x = 10 / 0
except ZeroDivisionError:
    print("Cannot divide by zero")

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3. Multiple Except Clauses

try:
    num = int("abc")
except ValueError:
    print("Invalid number")
except ZeroDivisionError:
    print("Division error")

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4. Catching Any Exception

try:
    risky_code()
except Exception as e:
    print("Error:", e)

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5. Using else with try

try:
    x = 10 / 2
except ZeroDivisionError:
    print("Error")
else:
    print("Success:", x)

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6. Finally Block

try:
    file = open("example.txt")
finally:
    file.close()

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7. Best Practices

• Catch specific exceptions first.
• Avoid bare except: unless necessary.
• Clean up resources with finally or context managers.

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8. Next Steps

✅ You now understand exception handling.
Next: Using finally and else in more detail.