| names beginning with an '_', and traversing to the name 'get' will give you |
names beginning with an '_', and traversing to the name 'get' will give you |
| the namespace's 'get' method, not the 'get' property in the namespace. To |
the namespace's 'get' method, not the 'get' property in the namespace. To |
| obtain the 'get' property, or properties beginning with '_', you must use |
obtain the 'get' property, or properties beginning with '_', you must use |
| the mapping style of access, as shown above.""" |
the mapping style of access, as shown above. |
| |
|
| def __init__(self, prefix, target=NOT_GIVEN, cacheAttrs=True): |
NOTE: By default, 'Namespace' instances cache every key that's looked up in |
| |
them. If you are holding a reference to a namespace, and you expect an |
| |
unbounded number of potential lookups, do not want references held to the |
| |
results, or are looking up dynamically changing or dynamically created |
| |
properties, you should disable caching via the 'cache=False' keyword arg.""" |
| |
|
| |
def __init__(self, prefix, target=NOT_GIVEN, cache=True): |
| self._prefix = PropertyName(prefix).asPrefix() |
self._prefix = PropertyName(prefix).asPrefix() |
| self._target = target |
self._target = target |
| self._cache = cacheAttrs |
self._cache = cache; self._data = {} |
| |
|
| def __call__(self, suffix): |
def __call__(self, suffix): |
| """Return a sub-namespace for 'suffix'""" |
"""Return a sub-namespace for 'suffix'""" |
| if not attr.startswith('_'): |
if not attr.startswith('_'): |
| ob = self.get(attr, NOT_FOUND) |
ob = self.get(attr, NOT_FOUND) |
| if ob is not NOT_FOUND: |
if ob is not NOT_FOUND: |
| if self._cache: |
if self._cache and not hasattr(self.__class__,attr): |
| setattr(self,attr,ob) # Cache for future use |
setattr(self,attr,ob) # Cache for future use |
| return ob |
return ob |
| raise AttributeError,attr |
raise AttributeError,attr |
| |
|
| def get(self,key,default=None): |
def get(self,key,default=None): |
| """Return property 'key' within this namespace, or 'default'""" |
"""Return property 'key' within this namespace, or 'default'""" |
| |
|
| if self._target is not NOT_GIVEN: |
if self._target is not NOT_GIVEN: |
| return lookup( |
if key in self._data: |
| |
return self._data[key] |
| |
|
| |
result = lookup( |
| self._target,PropertyName.fromString(self._prefix+key),default |
self._target,PropertyName.fromString(self._prefix+key),default |
| ) |
) |
| |
if self._cache and result is not default: |
| |
self._data[key] = result |
| |
return result |
| |
|
| return default |
return default |
| |
|
| |
|
| return "config.Namespace(%r,%r)" % (self._prefix,self._target) |
return "config.Namespace(%r,%r)" % (self._prefix,self._target) |
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| def keys(self): |
def keys(self): |
| |
|
| items = [] |
items = [] |
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| class __NamespaceExtensions(protocols.Adapter): |
class __NamespaceExtensions(protocols.Adapter): |
| |
|
| protocols.advise( |
protocols.advise( |
Diff of /PEAK/src/peak/config/config_components.py
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| 
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