Errors and exceptions are a normal part of programming in Python, and error handling is an important concept to understand. In Python, errors can be classified into two main categories: syntax errors and exceptions.
Syntax errors are errors that occur when you have a problem with the syntax of your code. These errors are usually easy to spot because Python will give you a clear error message that points to the exact line of code that caused the error.
Exceptions, on the other hand, are errors that occur when your code runs, even if the syntax is correct. Exceptions can happen for many reasons, such as when you try to divide a number by zero, or when you try to access an element of a list that doesn't exist.
To handle exceptions in Python, you can use a try-except block. The code inside the try block is the code that might raise an exception. If an exception is raised, the code inside the except block will be executed instead of stopping the program.
Here's an example of a try-except block:
try: x = 1 / 0except ZeroDivisionError: print("Cannot divide by zero") |
In this example, the code inside the try block will raise a ZeroDivisionError because we're trying to divide by zero. However, instead of stopping the program, the code inside the except block will be executed, which prints the message "Cannot divide by zero".
You can also catch multiple exceptions in the same try-except block, like this:
try: x = int("abc")except (ValueError, TypeError): print("Invalid input") |
I hope this helps! Let me know if you have any other questions.