Keystone Style Commandments =========================== - Step 1: Read the OpenStack Style Commandments http://docs.openstack.org/developer/hacking/ - Step 2: Read on Keystone Specific Commandments ------------------------------ - Avoid using "double quotes" where you can reasonably use 'single quotes' TODO vs FIXME ------------- - TODO(name): implies that something should be done (cleanup, refactoring, etc), but is expected to be functional. - FIXME(name): implies that the method/function/etc shouldn't be used until that code is resolved and bug fixed. Logging ------- Use the common logging module, and ensure you ``getLogger``:: from oslo_log import log LOG = log.getLogger(__name__) LOG.debug('Foobar') AssertEqual argument order -------------------------- assertEqual method's arguments should be in ('expected', 'actual') order. Properly Calling Callables -------------------------- Methods, functions and classes can specify optional parameters (with default values) using Python's keyword arg syntax. When providing a value to such a callable we prefer that the call also uses keyword arg syntax. For example:: def f(required, optional=None): pass # GOOD f(0, optional=True) # BAD f(0, True) This gives us the flexibility to re-order arguments and more importantly to add new required arguments. It's also more explicit and easier to read.