Try-Except in Python
Errors (called exceptions in Python) happen in every program – wrong input, missing files, division by zero, or unexpected situations.
Instead of letting the program crash, you can catch and handle these errors gracefully using try-except blocks. This makes your programs more reliable and user-friendly.
We'll cover the full syntax, common exception types, else/finally clauses, raising your own errors, and best practices.
Basic Try-Except
Put risky code in try. If an exception occurs, jump to except instead of crashing.
Catching Multiple Exceptions
You can handle different types of errors separately.
else Clause
else runs only if no exception occurred in try – perfect for code that should run on success.
finally Clause
finally always runs – whether there was an error or not. Great for cleanup (closing files, connections).
Raising Exceptions
Use raise to throw your own errors when something invalid happens.
Quick Quiz
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