Do not ignore Exception with a pass statement
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ID: python-best-practices/no-silent-exception
Language: Python
Severity: Error
Category: Best Practices
Description
Using the pass statement in an exception block ignores the exception. Exceptions should never be ignored. Instead, the user must add code to notify an exception occurred and attempt to handle it or recover from it.
The exception to this rule is the use of StopIteration or StopAsyncIteration when implementing a custom iterator (as those errors are used to acknowledge the end of a successful iteration).
Non-Compliant Code Examples
a = 2
b = 0
try:
c = a / b
except Exception as e:
pass # should use a regular statement and not ignore the exception
Compliant Code Examples
a = 2
b = 0
try:
c = a / b
except ZeroDivisionError as e:
print(e)
pass
try:
do_iteration()
except StopIteration: # Handling the iterator's successful conclusion is OK
pass
try:
do_async_iteration()
except StopAsyncIteration: # Handling the iterator's successful conclusion is OK
pass
