1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
# mypy: allow-untyped-defs
import os.path
from glob import glob
from typing import cast
import torch
from torch.types import Storage
__serialization_id_record_name__ = ".data/serialization_id"
# because get_storage_from_record returns a tensor!?
class _HasStorage:
def __init__(self, storage):
self._storage = storage
def storage(self):
return self._storage
class DirectoryReader:
"""
Class to allow PackageImporter to operate on unzipped packages. Methods
copy the behavior of the internal PyTorchFileReader class (which is used for
accessing packages in all other cases).
N.B.: ScriptObjects are not depickleable or accessible via this DirectoryReader
class due to ScriptObjects requiring an actual PyTorchFileReader instance.
"""
def __init__(self, directory):
self.directory = directory
def get_record(self, name):
filename = f"{self.directory}/{name}"
with open(filename, "rb") as f:
return f.read()
def get_storage_from_record(self, name, numel, dtype):
filename = f"{self.directory}/{name}"
nbytes = torch._utils._element_size(dtype) * numel
storage = cast(Storage, torch.UntypedStorage)
return _HasStorage(storage.from_file(filename=filename, nbytes=nbytes))
def has_record(self, path):
full_path = os.path.join(self.directory, path)
return os.path.isfile(full_path)
def get_all_records(
self,
):
files = [
filename[len(self.directory) + 1 :]
for filename in glob(f"{self.directory}/**", recursive=True)
if not os.path.isdir(filename)
]
return files
def serialization_id(
self,
):
if self.has_record(__serialization_id_record_name__):
return self.get_record(__serialization_id_record_name__)
else:
return ""
|
