Python Raise Syntax
raise {name_of_ the_ exception_class}
The basic way to raise an error is:
raise Exception(“user text”)
Checking whether an integer is odd or even
In the below code, we check if an integer is even or odd. if the integer is odd an exception is raised. a is a variable to which we assigned a number 5, as a is odd, then if loop checks if it’s an odd integer, if it’s an odd integer then an error is raised.
Python3
a = 5if a % 2 != 0: raise Exception("The number shouldn't be an odd integer") |
Output:
Checking Errror Type
We can check the type of error which have occurred during the execution of our code. The error can be a ‘ValueError’ or a ‘ZeroDivisionError’ or some other type of error.
Syntax: raise TypeError
Checking the error type
In the below code, we tried changing the string ‘apple’ assigned to s to integer and wrote a try-except clause to raise the ValueError. The raise error keyword raises a value error with the message “String can’t be changed into an integer”.
Python3
s = 'apple'try: num = int(s)except ValueError: raise ValueError("String can't be changed into integer") |
Output
Python Raise Keyword
In this article, we will learn how the Python Raise keyword works with the help of examples and its advantages.