FilesExpand file tree

main

/

outputs.py

Copy path

Blame

More file actions

Blame

More file actions

Latest commit

 

History

History

History

130 lines (102 loc) · 4.43 KB

main

/

outputs.py

Copy path

Top

File metadata and controls

• Code
• Blame

130 lines (102 loc) · 4.43 KB

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

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

67

68

69

70

71

72

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

89

90

91

92

93

94

95

96

97

98

99

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

# Copyright 2023 The HuggingFace Team. All rights reserved.

#

# Licensed under the Apache License, Version 2.0 (the "License");

# you may not use this file except in compliance with the License.

# You may obtain a copy of the License at

#

# http://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.

"""

Generic utilities

"""

from collections import OrderedDict

from dataclasses import fields, is_dataclass

from typing import Any, Tuple

import numpy as np

from .import_utils import is_torch_available

def is_tensor(x):

"""

Tests if `x` is a `torch.Tensor` or `np.ndarray`.

"""

if is_torch_available():

import torch

if isinstance(x, torch.Tensor):

return True

return isinstance(x, np.ndarray)

class BaseOutput(OrderedDict):

"""

Base class for all model outputs as dataclass. Has a `__getitem__` that allows indexing by integer or slice (like a

tuple) or strings (like a dictionary) that will ignore the `None` attributes. Otherwise behaves like a regular

Python dictionary.

<Tip warning={true}>

You can't unpack a [`BaseOutput`] directly. Use the [`~utils.BaseOutput.to_tuple`] method to convert it to a tuple

first.

</Tip>

"""

def __init_subclass__(cls) -> None:

"""Register subclasses as pytree nodes.

This is necessary to synchronize gradients when using `torch.nn.parallel.DistributedDataParallel` with

`static_graph=True` with modules that output `ModelOutput` subclasses.

"""

if is_torch_available():

import torch.utils._pytree

torch.utils._pytree._register_pytree_node(

cls,

torch.utils._pytree._dict_flatten,

lambda values, context: cls(**torch.utils._pytree._dict_unflatten(values, context)),

)

def __post_init__(self):

class_fields = fields(self)

# Safety and consistency checks

if not len(class_fields):

raise ValueError(f"{self.__class__.__name__} has no fields.")

first_field = getattr(self, class_fields[0].name)

other_fields_are_none = all(getattr(self, field.name) is None for field in class_fields[1:])

if other_fields_are_none and isinstance(first_field, dict):

for key, value in first_field.items():

self[key] = value

else:

for field in class_fields:

v = getattr(self, field.name)

if v is not None:

self[field.name] = v

def __delitem__(self, *args, **kwargs):

raise Exception(f"You cannot use ``__delitem__`` on a {self.__class__.__name__} instance.")

def setdefault(self, *args, **kwargs):

raise Exception(f"You cannot use ``setdefault`` on a {self.__class__.__name__} instance.")

def pop(self, *args, **kwargs):

raise Exception(f"You cannot use ``pop`` on a {self.__class__.__name__} instance.")

def update(self, *args, **kwargs):

raise Exception(f"You cannot use ``update`` on a {self.__class__.__name__} instance.")

def __getitem__(self, k):

if isinstance(k, str):

inner_dict = dict(self.items())

return inner_dict[k]

else:

return self.to_tuple()[k]

def __setattr__(self, name, value):

if name in self.keys() and value is not None:

# Don't call self.__setitem__ to avoid recursion errors

super().__setitem__(name, value)

super().__setattr__(name, value)

def __setitem__(self, key, value):

# Will raise a KeyException if needed

super().__setitem__(key, value)

# Don't call self.__setattr__ to avoid recursion errors

super().__setattr__(key, value)

def __reduce__(self):

if not is_dataclass(self):

return super().__reduce__()

callable, _args, *remaining = super().__reduce__()

args = tuple(getattr(self, field.name) for field in fields(self))

return callable, args, *remaining

def to_tuple(self) -> Tuple[Any]:

"""

Convert self to a tuple containing all the attributes/keys that are not `None`.

"""

return tuple(self[k] for k in self.keys())