Non-exception in ‘except’ clause¶
ID: py/useless-except Kind: problem Severity: error Precision: very-high Tags: - reliability - correctness - types Query suites: - python-security-and-quality.qls
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If the class specified in an
except handler (within a
try statement) is not a legal exception class, then it will never match a raised exception and never be executed
Legal exception classes are:
Any old-style classes (Python 2 only)
Any subclass of the builtin class
BaseExceptionHowever, it recommended that you only use subclasses of the builtin class
Exception(which is itself a subclass of
Ensure that the specified class is the one intended. If it is not then replace it with the correct one. Otherwise the entire
except block can be deleted.
def handle_int(): try: raise_int() #This will not cause an exception, but it will be ignored except int: print("This will never be printed")
Python Language Reference: Exceptions.
Python Tutorial: Handling Exceptions.