Python raise Keyword
Example
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")
Try it Yourself »
if x < 0:
raise Exception("Sorry, no numbers below zero")
Definition and Usage
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.
More Examples
Example
Raise a TypeError if x is not an integer:
x = "hello"
if not type(x) is int:
raise TypeError("Only integers are allowed")
Try it Yourself »
if not type(x) is int:
raise TypeError("Only integers are allowed")