HACKING.rst

Freezer DR Style Commandments

• Step 1: Read the OpenStack Style Commandments http://docs.openstack.org/developer/hacking/
• Step 2: Read on

Freezer DR Specific Commandments

Logging

Use the common logging module, and ensure you getLogger:

from oslo_log import log

LOG = log.getLogger(__name__)

LOG.debug('Foobar')

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.