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"""Base class for Namespace proxies in class creation.""" |
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3
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6 |
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import weakref |
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5
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from . import ops |
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6
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6 |
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from .proxy import _Proxy |
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8
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_NAMESPACES = weakref.WeakKeyDictionary() |
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9
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_OWNERS = weakref.WeakKeyDictionary() |
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10
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11
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12
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def namespace(self): |
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"""Return the associated Namespace.""" |
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return _owner(self).proxies[self] |
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def _owner(self): |
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"""Return the associated scope.""" |
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return _OWNERS[self] |
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22
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class _ScopeProxy(_Proxy): |
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"""Proxy object for manipulating namespaces during class creation.""" |
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__slots__ = ('__weakref__',) |
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def __init__(self, dct, owner): |
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_OWNERS[self] = owner |
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owner.proxies[self] = dct |
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32
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def __dir__(self): |
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return namespace(self) |
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35
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def __getattribute__(self, name): |
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dct = namespace(self) |
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try: |
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value = dct[name] |
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except KeyError: |
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raise AttributeError(name) |
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return _owner(self).wrap(value) |
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def __setattr__(self, name, value): |
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namespace(self)[name] = value |
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46
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def __delattr__(self, name): |
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ops.delete(namespace(self), name) |
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48
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49
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def __enter__(self): |
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return namespace(self).__enter__() |
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def __exit__(self, exc_type, exc_value, traceback): |
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return namespace(self).__exit__(exc_type, exc_value, traceback) |
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mwchase /
class-namespaces
