class-namespaces

Well-behaved class namespacing in Python. Inspired by https://erezsh.wordpress.com/2008/06/27/namespaces-lets-do-more-of-those-python-hackery/

Basic Usage

Example code:

import class_namespaces as cn

class MyCls(cn.Namespaceable):

    var = 1

    with cn.Namespace() as my_ns:
        var = 2

assert MyCls.var == 1
assert MyCls.my_ns.var == 2

Other things that work:

• Descriptors (methods, classmethods, staticmethods, properties, custom descriptors)
• super()
• Prepopulating Namespaces. The constructor takes the same arguments as a dict.
• abstractmethods. See the compat module.

Things that don't work:

• Various ways of putting a Namespace in a Namespace that I didn't see an obvious way to handle. In particular...
  • There is no way to put an established namespace directly into another namespace.
• Some pytest constructs behave weirdly inside the class definitions. Hopefully, this doesn't matter to anyone not writing tests for the package.
• No way to have instance Namespaces on non-hashable types, or subclasses of some built-in types, particularly tuple. Try using data descriptors instead.

Things that might work:

• New namespace features in Python 3.6. Current testing is spotty.
• Combining with other metaclasses. Unfortunately, the current setup is somewhat brittle. It may be necessary to experiment with the ordering of bases.