Python Raise an Exception

Raise an exception

As a Python developer you can choose to throw an exception if a condition occurs.

To throw (or raise) an exception, use the raise keyword.

Raise an error and stop the program if x is lower than 0:

x = -1

if x < 0:
raise Exception("Sorry, no numbers below zero")

The raise keyword is used to raise an exception.

You can define what kind of error to raise, and the text to print to the user.

Raise a TypeError if x is not an integer:

x = "hello"

if not type(x) is int:
raise TypeError("Only integers are allowed")