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83a93ee145
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/53049 This makes our API symmetric--now we have an `Importer` aware Pickler and Unpickler implementation that have similar interfaces. Test Plan: Imported from OSS Reviewed By: Lilyjjo Differential Revision: D26734593 Pulled By: suo fbshipit-source-id: 3479437cf6b98e0d6a8aa4907c75f0c61d5495d4
69 lines
2.5 KiB
Python
69 lines
2.5 KiB
Python
import io
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import torch
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from torch.package._package_pickler import create_pickler
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from torch.package._package_unpickler import PackageUnpickler
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from torch.package import sys_importer, OrderedImporter, PackageImporter, Importer
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from torch.serialization import _maybe_decode_ascii
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def _save_storages(importer, obj):
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serialized_storages = []
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serialized_dtypes = []
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def persistent_id(obj):
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# FIXME: the docs say that persistent_id should only return a string
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# but torch store returns tuples. This works only in the binary protocol
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# see
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# https://docs.python.org/2/library/pickle.html#pickling-and-unpickling-external-objects
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# https://github.com/python/cpython/blob/master/Lib/pickle.py#L527-L537
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if torch.is_storage(obj):
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serialized_storages.append(obj)
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serialized_dtypes.append(obj.dtype)
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return ('storage', len(serialized_storages) - 1)
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return None
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# Write the pickle data for `obj`
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data_buf = io.BytesIO()
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importer = importer if isinstance(importer, torch.package.PackageImporter) else None
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importers: Importer
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if importer is not None:
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importers = OrderedImporter(importer, sys_importer)
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else:
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importers = sys_importer
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pickler = create_pickler(data_buf, importers)
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pickler.persistent_id = persistent_id
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pickler.dump(obj)
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data_value = data_buf.getvalue()
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return data_value, serialized_storages, serialized_dtypes, importer.zip_reader if importer else None
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def _load_storages(id, zip_reader, obj_bytes, serialized_storages):
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def persistent_load(saved_id):
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assert isinstance(saved_id, tuple)
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typename = _maybe_decode_ascii(saved_id[0])
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data = saved_id[1:]
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assert typename == 'storage', \
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f"Unknown typename for persistent_load, expected 'storage' but got '{typename}'"
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return serialized_storages[data[0]]
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importer: Importer
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if zip_reader is not None:
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importer = OrderedImporter(_get_package(zip_reader), sys_importer)
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else:
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importer = sys_importer
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unpickler = PackageUnpickler(importer, io.BytesIO(obj_bytes))
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unpickler.persistent_load = persistent_load
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result = _deploy_objects[id] = unpickler.load()
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return result
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def _get_package(zip_reader):
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if zip_reader not in _raw_packages:
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_raw_packages[zip_reader] = PackageImporter(zip_reader)
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return _raw_packages[zip_reader]
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_raw_packages: dict = {}
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_deploy_objects: dict = {}
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