rspec/rules/S3984/python/rule.adoc

Creating a new ``++Exception++`` without actually raising it has no effect and is probably due to a mistake.

== Noncompliant Code Example

----
def func(x):
    if not isinstance(x, int):
        TypeError("Wrong type for parameter 'x'. func expects an integer")  # Noncompliant
    if x < 0:
        ValueError  # Noncompliant
    return x + 42
----

== Compliant Solution

----
def func(x):
    if not isinstance(x, int):
        raise TypeError("Wrong type for parameter 'x'. func expects an integer")
    if x < 0:
        raise ValueError
    return x + 42
----

== See

* https://docs.python.org/3/tutorial/errors.html#raising-exceptions[Python documentation - Raising Exceptions]