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authorAlexSm <alex@ydb.tech>2024-03-05 10:40:59 +0100
committerGitHub <noreply@github.com>2024-03-05 12:40:59 +0300
commit1ac13c847b5358faba44dbb638a828e24369467b (patch)
tree07672b4dd3604ad3dee540a02c6494cb7d10dc3d /contrib/tools/python3/Lib/importlib/resources/simple.py
parentffcca3e7f7958ddc6487b91d3df8c01054bd0638 (diff)
downloadydb-1ac13c847b5358faba44dbb638a828e24369467b.tar.gz
Library import 16 (#2433)
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Diffstat (limited to 'contrib/tools/python3/Lib/importlib/resources/simple.py')
-rw-r--r--contrib/tools/python3/Lib/importlib/resources/simple.py106
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diff --git a/contrib/tools/python3/Lib/importlib/resources/simple.py b/contrib/tools/python3/Lib/importlib/resources/simple.py
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+++ b/contrib/tools/python3/Lib/importlib/resources/simple.py
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+"""
+Interface adapters for low-level readers.
+"""
+
+import abc
+import io
+import itertools
+from typing import BinaryIO, List
+
+from .abc import Traversable, TraversableResources
+
+
+class SimpleReader(abc.ABC):
+ """
+ The minimum, low-level interface required from a resource
+ provider.
+ """
+
+ @property
+ @abc.abstractmethod
+ def package(self) -> str:
+ """
+ The name of the package for which this reader loads resources.
+ """
+
+ @abc.abstractmethod
+ def children(self) -> List['SimpleReader']:
+ """
+ Obtain an iterable of SimpleReader for available
+ child containers (e.g. directories).
+ """
+
+ @abc.abstractmethod
+ def resources(self) -> List[str]:
+ """
+ Obtain available named resources for this virtual package.
+ """
+
+ @abc.abstractmethod
+ def open_binary(self, resource: str) -> BinaryIO:
+ """
+ Obtain a File-like for a named resource.
+ """
+
+ @property
+ def name(self):
+ return self.package.split('.')[-1]
+
+
+class ResourceContainer(Traversable):
+ """
+ Traversable container for a package's resources via its reader.
+ """
+
+ def __init__(self, reader: SimpleReader):
+ self.reader = reader
+
+ def is_dir(self):
+ return True
+
+ def is_file(self):
+ return False
+
+ def iterdir(self):
+ files = (ResourceHandle(self, name) for name in self.reader.resources)
+ dirs = map(ResourceContainer, self.reader.children())
+ return itertools.chain(files, dirs)
+
+ def open(self, *args, **kwargs):
+ raise IsADirectoryError()
+
+
+class ResourceHandle(Traversable):
+ """
+ Handle to a named resource in a ResourceReader.
+ """
+
+ def __init__(self, parent: ResourceContainer, name: str):
+ self.parent = parent
+ self.name = name # type: ignore
+
+ def is_file(self):
+ return True
+
+ def is_dir(self):
+ return False
+
+ def open(self, mode='r', *args, **kwargs):
+ stream = self.parent.reader.open_binary(self.name)
+ if 'b' not in mode:
+ stream = io.TextIOWrapper(*args, **kwargs)
+ return stream
+
+ def joinpath(self, name):
+ raise RuntimeError("Cannot traverse into a resource")
+
+
+class TraversableReader(TraversableResources, SimpleReader):
+ """
+ A TraversableResources based on SimpleReader. Resource providers
+ may derive from this class to provide the TraversableResources
+ interface by supplying the SimpleReader interface.
+ """
+
+ def files(self):
+ return ResourceContainer(self)