maestro-server/analytics-maestro

Trailing blank lines are superfluous.

Okay: spam(1)
W391: spam(1)\n

However the last line should end with a new line (warning W292).

Comparison to singletons should use "is" or "is not".

Comparisons to singletons like None should always be done
with "is" or "is not", never the equality operators.

Okay: if arg is not None:
E711: if arg != None:
E711: if None == arg:
E712: if arg == True:
E712: if False == arg:

Also, beware of writing if x when you really mean if x is not None
-- e.g. when testing whether a variable or argument that defaults to
None was set to some other value.  The other value might have a type
(such as a container) that could be false in a boolean context!