Python-exceptionHandling.pptx
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Syntax errors occur due to incorrect syntax and terminate the program, while exceptions are raised when code is syntactically correct but results in an error, changing normal program flow without terminating. Try and except statements are used to catch and handle exceptions in Python by keeping exception-raising code in the try clause and exception handling code in except clauses, and can specify different handlers for different exceptions. The else clause runs if no exceptions occur in the try block.
Python-exceptionHandling.pptx
- 2. Syntax error Syntax Error: As the name suggests this error is caused by the wrong syntax in the code. It leads to the termination of the program.
- 3. Exceptions Error Exceptions: Exceptions are raised when the program is syntactically correct, but the code resulted in an error. This error does not stop the execution of the program, however, it changes the normal flow of the program.
- 4. Try and Except Statement – Catching Exceptions Try and except statements are used to catch and handle exceptions in Python. Statements that can raise exceptions are kept inside the try clause and the statements that handle the exception are written inside except clause.
- 5. Catching Specific Exception A try statement can have more than one except clause, to specify handlers for different exceptions. Please note that at most one handler will be executed. For example, we can add IndexError in the above code. The general syntax for adding specific exceptions are – try: # statement(s) except IndexError: # statement(s) except ValueError: # statement(s)
- 6. Example
- 7. Try with Else Clause In python, you can also use the else clause on the try-except block which must be present after all the except clauses. The code enters the else block only if the try clause does not raise an exception.