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Exception Error Messages

You can associate a message with an exception when you raise it. Builtin exceptions often have messages associated with them already.

To get the message when you catch the exception, just give it a name with the as keyword.

def raise_exception():
    text = input("Enter 'error' to raise an exception: ")

    if text == "error":
        raise Exception("Oh no, an exception!")
def main():

    except Exception as e:

Enter 'error' to raise an exception: error
Oh no, an exception!Enter 'error' to raise an exception: error
Oh no, an exception!

e‘ in this code is a variable we’re using to refer to the exception itself.

When we pass the exception object to print, the __str__ method of the exception gets invoked to turn it into a string for printing.

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