Rule Definition
Exceptions are a mechanism to interrupt a program for signaling run-time anomalies in the code. In Python the common way for object type checking is to 'try' methods and properties. Thus well-defined exceptions are expected to appear and often the desired reaction is to silently ignore them. A catch-all except clause (one that captures all types of exceptions) when not properly handled ascribes this behaviour to every exception, included the unexpected. This practice should be avoided because it hinders debugging.

Remediation
The exception must be handled correctly according to its type. If no exception type is declared or if a high-level cath-all exception type is used, the body of the exception block should execute specific code or inform if something wrong happened.

Violation Code Sample

>>> try:
>>>     doSomething()
>>> except:          # no exception type declared
>>>     pass         # empty handler

Fixed Code Sample

>>> # easy remediation
>>> try:
>>>     doSomething()
>>> except:
>>>     logging.debug("Someting happened")

>>> # better remediation
>>> try:
>>>     doSomething()
>>> except SomeException as e:
>>>     logging.debug("Something happened:" + e.error)
>>> except:
>>>     logging.debug("Something unexpected happened ...")
        

CISQ OMG ASCRM-RLB-01