In Python it is possible to catch multiple types of exception in a single except statement using a tuple of the exceptions.
Repeating an exception class in a single except statement will not fail but it does not have any effect. Either the exception class is
not the one which should be caught, or it is duplicated code which should be removed.
Having a subclass and a parent class in the same except statement does not provide any benefit either. It is enough to keep only the
parent class.
Code examples
Noncompliant code example
try:
...
except (TypeError, TypeError): # Noncompliant: duplicated code or incorrect exception class.
print("Foo")
try:
...
except (NotImplementedError, RuntimeError): # Noncompliant: NotImplementedError inherits from RuntimeError.
print("Foo")
Compliant solution
try:
...
except (TypeError, ValueError):
print("Foo")
try:
...
except RuntimeError:
print("Foo")
