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Is the cache stale for the given resource?
:param resource: The :class:`Resource` being cached.
:param path: The path of the resource in the cache.
:return: True if the cache is stale.
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Get a resource into the cache,
:param resource: A :class:`Resource` instance.
:return: The pathname of the resource in the cache.
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A class representing an in-package resource, such as a data file. This is
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Get the resource as a stream.
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Resource finder for file system resources.
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Resource finder for resources in .zip files.
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Return a resource finder for a package.
:param package: The name of the package.
:return: A :class:`ResourceFinder` instance for the package.
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Return a resource finder for a path, which should represent a container.
:param path: The path.
:return: A :class:`ResourceFinder` instance for the path.
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