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912 lines
34 KiB
912 lines
34 KiB
5 months ago
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import warnings
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from collections import OrderedDict, abc as container_abcs
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from itertools import chain, islice
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import operator
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import torch
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from .module import Module
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from ..parameter import Parameter
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from torch._jit_internal import _copy_to_script_wrapper
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from typing import Any, Dict, Iterable, Iterator, Mapping, Optional, overload, Tuple, TypeVar, Union
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from typing_extensions import Self
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__all__ = ['Container', 'Sequential', 'ModuleList', 'ModuleDict', 'ParameterList', 'ParameterDict']
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T = TypeVar('T', bound=Module)
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# Copied from torch.nn.modules.module, required for a custom __repr__ for ModuleList
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def _addindent(s_, numSpaces):
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s = s_.split('\n')
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# don't do anything for single-line stuff
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if len(s) == 1:
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return s_
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first = s.pop(0)
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s = [(numSpaces * ' ') + line for line in s]
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s = '\n'.join(s)
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s = first + '\n' + s
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return s
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class Container(Module):
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def __init__(self, **kwargs: Any) -> None:
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super().__init__()
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# DeprecationWarning is ignored by default <sigh>
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warnings.warn("nn.Container is deprecated. All of it's functionality "
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"is now implemented in nn.Module. Subclass that instead.")
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for key, value in kwargs.items():
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self.add_module(key, value)
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class Sequential(Module):
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r"""A sequential container.
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Modules will be added to it in the order they are passed in the
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constructor. Alternatively, an ``OrderedDict`` of modules can be
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passed in. The ``forward()`` method of ``Sequential`` accepts any
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input and forwards it to the first module it contains. It then
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"chains" outputs to inputs sequentially for each subsequent module,
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finally returning the output of the last module.
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The value a ``Sequential`` provides over manually calling a sequence
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of modules is that it allows treating the whole container as a
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single module, such that performing a transformation on the
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``Sequential`` applies to each of the modules it stores (which are
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each a registered submodule of the ``Sequential``).
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What's the difference between a ``Sequential`` and a
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:class:`torch.nn.ModuleList`? A ``ModuleList`` is exactly what it
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sounds like--a list for storing ``Module`` s! On the other hand,
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the layers in a ``Sequential`` are connected in a cascading way.
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Example::
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# Using Sequential to create a small model. When `model` is run,
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# input will first be passed to `Conv2d(1,20,5)`. The output of
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# `Conv2d(1,20,5)` will be used as the input to the first
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# `ReLU`; the output of the first `ReLU` will become the input
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# for `Conv2d(20,64,5)`. Finally, the output of
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# `Conv2d(20,64,5)` will be used as input to the second `ReLU`
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model = nn.Sequential(
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nn.Conv2d(1,20,5),
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nn.ReLU(),
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nn.Conv2d(20,64,5),
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nn.ReLU()
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)
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# Using Sequential with OrderedDict. This is functionally the
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# same as the above code
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model = nn.Sequential(OrderedDict([
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('conv1', nn.Conv2d(1,20,5)),
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('relu1', nn.ReLU()),
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('conv2', nn.Conv2d(20,64,5)),
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('relu2', nn.ReLU())
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]))
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"""
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_modules: Dict[str, Module] # type: ignore[assignment]
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@overload
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def __init__(self, *args: Module) -> None:
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...
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@overload
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def __init__(self, arg: 'OrderedDict[str, Module]') -> None:
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...
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def __init__(self, *args):
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super().__init__()
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if len(args) == 1 and isinstance(args[0], OrderedDict):
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for key, module in args[0].items():
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self.add_module(key, module)
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else:
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for idx, module in enumerate(args):
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self.add_module(str(idx), module)
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def _get_item_by_idx(self, iterator, idx) -> T: # type: ignore[misc, type-var]
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"""Get the idx-th item of the iterator."""
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size = len(self)
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idx = operator.index(idx)
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if not -size <= idx < size:
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raise IndexError(f'index {idx} is out of range')
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idx %= size
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return next(islice(iterator, idx, None))
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@_copy_to_script_wrapper
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def __getitem__(self, idx: Union[slice, int]) -> Union['Sequential', T]:
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if isinstance(idx, slice):
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return self.__class__(OrderedDict(list(self._modules.items())[idx]))
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else:
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return self._get_item_by_idx(self._modules.values(), idx)
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def __setitem__(self, idx: int, module: Module) -> None:
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key: str = self._get_item_by_idx(self._modules.keys(), idx)
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return setattr(self, key, module)
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def __delitem__(self, idx: Union[slice, int]) -> None:
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if isinstance(idx, slice):
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for key in list(self._modules.keys())[idx]:
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delattr(self, key)
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else:
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key = self._get_item_by_idx(self._modules.keys(), idx)
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delattr(self, key)
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# To preserve numbering
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str_indices = [str(i) for i in range(len(self._modules))]
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self._modules = OrderedDict(list(zip(str_indices, self._modules.values())))
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@_copy_to_script_wrapper
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def __len__(self) -> int:
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return len(self._modules)
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def __add__(self, other) -> 'Sequential':
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if isinstance(other, Sequential):
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ret = Sequential()
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for layer in self:
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ret.append(layer)
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for layer in other:
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ret.append(layer)
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return ret
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else:
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raise ValueError('add operator supports only objects '
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f'of Sequential class, but {str(type(other))} is given.')
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def pop(self, key: Union[int, slice]) -> Module:
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v = self[key]
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del self[key]
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return v
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def __iadd__(self, other) -> Self:
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if isinstance(other, Sequential):
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offset = len(self)
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for i, module in enumerate(other):
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self.add_module(str(i + offset), module)
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return self
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else:
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raise ValueError('add operator supports only objects '
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f'of Sequential class, but {str(type(other))} is given.')
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def __mul__(self, other: int) -> 'Sequential':
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if not isinstance(other, int):
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raise TypeError(f"unsupported operand type(s) for *: {type(self)} and {type(other)}")
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elif (other <= 0):
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raise ValueError(f"Non-positive multiplication factor {other} for {type(self)}")
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else:
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combined = Sequential()
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offset = 0
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for _ in range(other):
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for module in self:
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combined.add_module(str(offset), module)
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offset += 1
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return combined
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def __rmul__(self, other: int) -> 'Sequential':
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return self.__mul__(other)
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def __imul__(self, other: int) -> Self:
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if not isinstance(other, int):
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raise TypeError(f"unsupported operand type(s) for *: {type(self)} and {type(other)}")
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elif (other <= 0):
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raise ValueError(f"Non-positive multiplication factor {other} for {type(self)}")
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else:
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len_original = len(self)
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offset = len(self)
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for _ in range(other - 1):
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for i in range(len_original):
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self.add_module(str(i + offset), self._modules[str(i)])
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offset += len_original
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return self
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@_copy_to_script_wrapper
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def __dir__(self):
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keys = super().__dir__()
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keys = [key for key in keys if not key.isdigit()]
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return keys
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@_copy_to_script_wrapper
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def __iter__(self) -> Iterator[Module]:
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return iter(self._modules.values())
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# NB: We can't really type check this function as the type of input
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# may change dynamically (as is tested in
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# TestScript.test_sequential_intermediary_types). Cannot annotate
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# with Any as TorchScript expects a more precise type
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def forward(self, input):
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for module in self:
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input = module(input)
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return input
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def append(self, module: Module) -> 'Sequential':
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r"""Append a given module to the end.
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Args:
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module (nn.Module): module to append
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"""
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self.add_module(str(len(self)), module)
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return self
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def insert(self, index: int, module: Module) -> 'Sequential':
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if not isinstance(module, Module):
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raise AssertionError(
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f'module should be of type: {Module}')
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n = len(self._modules)
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if not (-n <= index <= n):
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raise IndexError(
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f'Index out of range: {index}')
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if index < 0:
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index += n
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for i in range(n, index, -1):
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self._modules[str(i)] = self._modules[str(i - 1)]
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self._modules[str(index)] = module
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return self
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def extend(self, sequential) -> 'Sequential':
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for layer in sequential:
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self.append(layer)
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return self
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class ModuleList(Module):
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r"""Holds submodules in a list.
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:class:`~torch.nn.ModuleList` can be indexed like a regular Python list, but
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modules it contains are properly registered, and will be visible by all
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:class:`~torch.nn.Module` methods.
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Args:
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modules (iterable, optional): an iterable of modules to add
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Example::
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class MyModule(nn.Module):
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def __init__(self):
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super().__init__()
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self.linears = nn.ModuleList([nn.Linear(10, 10) for i in range(10)])
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def forward(self, x):
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# ModuleList can act as an iterable, or be indexed using ints
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for i, l in enumerate(self.linears):
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x = self.linears[i // 2](x) + l(x)
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return x
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"""
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_modules: Dict[str, Module] # type: ignore[assignment]
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def __init__(self, modules: Optional[Iterable[Module]] = None) -> None:
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super().__init__()
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if modules is not None:
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self += modules
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def _get_abs_string_index(self, idx):
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"""Get the absolute index for the list of modules."""
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idx = operator.index(idx)
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if not (-len(self) <= idx < len(self)):
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raise IndexError(f'index {idx} is out of range')
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if idx < 0:
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idx += len(self)
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return str(idx)
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@_copy_to_script_wrapper
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def __getitem__(self, idx: Union[int, slice]) -> Union[Module, 'ModuleList']:
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if isinstance(idx, slice):
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return self.__class__(list(self._modules.values())[idx])
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else:
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return self._modules[self._get_abs_string_index(idx)]
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def __setitem__(self, idx: int, module: Module) -> None:
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idx = self._get_abs_string_index(idx)
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return setattr(self, str(idx), module)
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def __delitem__(self, idx: Union[int, slice]) -> None:
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if isinstance(idx, slice):
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for k in range(len(self._modules))[idx]:
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delattr(self, str(k))
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else:
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delattr(self, self._get_abs_string_index(idx))
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# To preserve numbering, self._modules is being reconstructed with modules after deletion
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str_indices = [str(i) for i in range(len(self._modules))]
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self._modules = OrderedDict(list(zip(str_indices, self._modules.values())))
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@_copy_to_script_wrapper
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def __len__(self) -> int:
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return len(self._modules)
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@_copy_to_script_wrapper
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def __iter__(self) -> Iterator[Module]:
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return iter(self._modules.values())
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def __iadd__(self, modules: Iterable[Module]) -> Self:
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return self.extend(modules)
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def __add__(self, other: Iterable[Module]) -> 'ModuleList':
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combined = ModuleList()
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for i, module in enumerate(chain(self, other)):
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combined.add_module(str(i), module)
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return combined
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def __repr__(self):
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"""Return a custom repr for ModuleList that compresses repeated module representations."""
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list_of_reprs = [repr(item) for item in self]
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if len(list_of_reprs) == 0:
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return self._get_name() + '()'
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start_end_indices = [[0, 0]]
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repeated_blocks = [list_of_reprs[0]]
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for i, r in enumerate(list_of_reprs[1:], 1):
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if r == repeated_blocks[-1]:
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start_end_indices[-1][1] += 1
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continue
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start_end_indices.append([i, i])
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repeated_blocks.append(r)
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lines = []
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main_str = self._get_name() + '('
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for (start_id, end_id), b in zip(start_end_indices, repeated_blocks):
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local_repr = f"({start_id}): {b}" # default repr
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if start_id != end_id:
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n = end_id - start_id + 1
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local_repr = f"({start_id}-{end_id}): {n} x {b}"
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local_repr = _addindent(local_repr, 2)
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lines.append(local_repr)
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main_str += '\n ' + '\n '.join(lines) + '\n'
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main_str += ')'
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return main_str
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@_copy_to_script_wrapper
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def __dir__(self):
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keys = super().__dir__()
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|
|
keys = [key for key in keys if not key.isdigit()]
|
||
|
|
return keys
|
||
|
|
|
||
|
|
def insert(self, index: int, module: Module) -> None:
|
||
|
|
r"""Insert a given module before a given index in the list.
|
||
|
|
|
||
|
|
Args:
|
||
|
|
index (int): index to insert.
|
||
|
|
module (nn.Module): module to insert
|
||
|
|
"""
|
||
|
|
for i in range(len(self._modules), index, -1):
|
||
|
|
self._modules[str(i)] = self._modules[str(i - 1)]
|
||
|
|
self._modules[str(index)] = module
|
||
|
|
|
||
|
|
def append(self, module: Module) -> 'ModuleList':
|
||
|
|
r"""Append a given module to the end of the list.
|
||
|
|
|
||
|
|
Args:
|
||
|
|
module (nn.Module): module to append
|
||
|
|
"""
|
||
|
|
self.add_module(str(len(self)), module)
|
||
|
|
return self
|
||
|
|
|
||
|
|
def pop(self, key: Union[int, slice]) -> Module:
|
||
|
|
v = self[key]
|
||
|
|
del self[key]
|
||
|
|
return v
|
||
|
|
|
||
|
|
def extend(self, modules: Iterable[Module]) -> Self:
|
||
|
|
r"""Append modules from a Python iterable to the end of the list.
|
||
|
|
|
||
|
|
Args:
|
||
|
|
modules (iterable): iterable of modules to append
|
||
|
|
"""
|
||
|
|
if not isinstance(modules, container_abcs.Iterable):
|
||
|
|
raise TypeError("ModuleList.extend should be called with an "
|
||
|
|
"iterable, but got " + type(modules).__name__)
|
||
|
|
offset = len(self)
|
||
|
|
for i, module in enumerate(modules):
|
||
|
|
self.add_module(str(offset + i), module)
|
||
|
|
return self
|
||
|
|
|
||
|
|
# remove forward alltogether to fallback on Module's _forward_unimplemented
|
||
|
|
|
||
|
|
|
||
|
|
class ModuleDict(Module):
|
||
|
|
r"""Holds submodules in a dictionary.
|
||
|
|
|
||
|
|
:class:`~torch.nn.ModuleDict` can be indexed like a regular Python dictionary,
|
||
|
|
but modules it contains are properly registered, and will be visible by all
|
||
|
|
:class:`~torch.nn.Module` methods.
|
||
|
|
|
||
|
|
:class:`~torch.nn.ModuleDict` is an **ordered** dictionary that respects
|
||
|
|
|
||
|
|
* the order of insertion, and
|
||
|
|
|
||
|
|
* in :meth:`~torch.nn.ModuleDict.update`, the order of the merged
|
||
|
|
``OrderedDict``, ``dict`` (started from Python 3.6) or another
|
||
|
|
:class:`~torch.nn.ModuleDict` (the argument to
|
||
|
|
:meth:`~torch.nn.ModuleDict.update`).
|
||
|
|
|
||
|
|
Note that :meth:`~torch.nn.ModuleDict.update` with other unordered mapping
|
||
|
|
types (e.g., Python's plain ``dict`` before Python version 3.6) does not
|
||
|
|
preserve the order of the merged mapping.
|
||
|
|
|
||
|
|
Args:
|
||
|
|
modules (iterable, optional): a mapping (dictionary) of (string: module)
|
||
|
|
or an iterable of key-value pairs of type (string, module)
|
||
|
|
|
||
|
|
Example::
|
||
|
|
|
||
|
|
class MyModule(nn.Module):
|
||
|
|
def __init__(self):
|
||
|
|
super().__init__()
|
||
|
|
self.choices = nn.ModuleDict({
|
||
|
|
'conv': nn.Conv2d(10, 10, 3),
|
||
|
|
'pool': nn.MaxPool2d(3)
|
||
|
|
})
|
||
|
|
self.activations = nn.ModuleDict([
|
||
|
|
['lrelu', nn.LeakyReLU()],
|
||
|
|
['prelu', nn.PReLU()]
|
||
|
|
])
|
||
|
|
|
||
|
|
def forward(self, x, choice, act):
|
||
|
|
x = self.choices[choice](x)
|
||
|
|
x = self.activations[act](x)
|
||
|
|
return x
|
||
|
|
"""
|
||
|
|
|
||
|
|
_modules: Dict[str, Module] # type: ignore[assignment]
|
||
|
|
|
||
|
|
def __init__(self, modules: Optional[Mapping[str, Module]] = None) -> None:
|
||
|
|
super().__init__()
|
||
|
|
if modules is not None:
|
||
|
|
self.update(modules)
|
||
|
|
|
||
|
|
@_copy_to_script_wrapper
|
||
|
|
def __getitem__(self, key: str) -> Module:
|
||
|
|
return self._modules[key]
|
||
|
|
|
||
|
|
def __setitem__(self, key: str, module: Module) -> None:
|
||
|
|
self.add_module(key, module)
|
||
|
|
|
||
|
|
def __delitem__(self, key: str) -> None:
|
||
|
|
del self._modules[key]
|
||
|
|
|
||
|
|
@_copy_to_script_wrapper
|
||
|
|
def __len__(self) -> int:
|
||
|
|
return len(self._modules)
|
||
|
|
|
||
|
|
@_copy_to_script_wrapper
|
||
|
|
def __iter__(self) -> Iterator[str]:
|
||
|
|
return iter(self._modules)
|
||
|
|
|
||
|
|
@_copy_to_script_wrapper
|
||
|
|
def __contains__(self, key: str) -> bool:
|
||
|
|
return key in self._modules
|
||
|
|
|
||
|
|
def clear(self) -> None:
|
||
|
|
"""Remove all items from the ModuleDict."""
|
||
|
|
self._modules.clear()
|
||
|
|
|
||
|
|
def pop(self, key: str) -> Module:
|
||
|
|
r"""Remove key from the ModuleDict and return its module.
|
||
|
|
|
||
|
|
Args:
|
||
|
|
key (str): key to pop from the ModuleDict
|
||
|
|
"""
|
||
|
|
v = self[key]
|
||
|
|
del self[key]
|
||
|
|
return v
|
||
|
|
|
||
|
|
@_copy_to_script_wrapper
|
||
|
|
def keys(self) -> Iterable[str]:
|
||
|
|
r"""Return an iterable of the ModuleDict keys."""
|
||
|
|
return self._modules.keys()
|
||
|
|
|
||
|
|
@_copy_to_script_wrapper
|
||
|
|
def items(self) -> Iterable[Tuple[str, Module]]:
|
||
|
|
r"""Return an iterable of the ModuleDict key/value pairs."""
|
||
|
|
return self._modules.items()
|
||
|
|
|
||
|
|
@_copy_to_script_wrapper
|
||
|
|
def values(self) -> Iterable[Module]:
|
||
|
|
r"""Return an iterable of the ModuleDict values."""
|
||
|
|
return self._modules.values()
|
||
|
|
|
||
|
|
def update(self, modules: Mapping[str, Module]) -> None:
|
||
|
|
r"""Update the :class:`~torch.nn.ModuleDict` with key-value pairs from a mapping, overwriting existing keys.
|
||
|
|
|
||
|
|
.. note::
|
||
|
|
If :attr:`modules` is an ``OrderedDict``, a :class:`~torch.nn.ModuleDict`, or
|
||
|
|
an iterable of key-value pairs, the order of new elements in it is preserved.
|
||
|
|
|
||
|
|
Args:
|
||
|
|
modules (iterable): a mapping (dictionary) from string to :class:`~torch.nn.Module`,
|
||
|
|
or an iterable of key-value pairs of type (string, :class:`~torch.nn.Module`)
|
||
|
|
"""
|
||
|
|
if not isinstance(modules, container_abcs.Iterable):
|
||
|
|
raise TypeError("ModuleDict.update should be called with an "
|
||
|
|
"iterable of key/value pairs, but got " +
|
||
|
|
type(modules).__name__)
|
||
|
|
|
||
|
|
if isinstance(modules, (OrderedDict, ModuleDict, container_abcs.Mapping)):
|
||
|
|
for key, module in modules.items():
|
||
|
|
self[key] = module
|
||
|
|
else:
|
||
|
|
# modules here can be a list with two items
|
||
|
|
for j, m in enumerate(modules):
|
||
|
|
if not isinstance(m, container_abcs.Iterable):
|
||
|
|
raise TypeError("ModuleDict update sequence element "
|
||
|
|
"#" + str(j) + " should be Iterable; is" +
|
||
|
|
type(m).__name__)
|
||
|
|
if not len(m) == 2:
|
||
|
|
raise ValueError("ModuleDict update sequence element "
|
||
|
|
"#" + str(j) + " has length " + str(len(m)) +
|
||
|
|
"; 2 is required")
|
||
|
|
# modules can be Mapping (what it's typed at), or a list: [(name1, module1), (name2, module2)]
|
||
|
|
# that's too cumbersome to type correctly with overloads, so we add an ignore here
|
||
|
|
self[m[0]] = m[1] # type: ignore[assignment]
|
||
|
|
|
||
|
|
# remove forward alltogether to fallback on Module's _forward_unimplemented
|
||
|
|
|
||
|
|
|
||
|
|
class ParameterList(Module):
|
||
|
|
r"""Holds parameters in a list.
|
||
|
|
|
||
|
|
:class:`~torch.nn.ParameterList` can be used like a regular Python
|
||
|
|
list, but Tensors that are :class:`~torch.nn.Parameter` are properly registered,
|
||
|
|
and will be visible by all :class:`~torch.nn.Module` methods.
|
||
|
|
|
||
|
|
Note that the constructor, assigning an element of the list, the
|
||
|
|
:meth:`~torch.nn.ParameterDict.append` method and the :meth:`~torch.nn.ParameterDict.extend`
|
||
|
|
method will convert any :class:`~torch.Tensor` into :class:`~torch.nn.Parameter`.
|
||
|
|
|
||
|
|
Args:
|
||
|
|
parameters (iterable, optional): an iterable of elements to add to the list.
|
||
|
|
|
||
|
|
Example::
|
||
|
|
|
||
|
|
class MyModule(nn.Module):
|
||
|
|
def __init__(self):
|
||
|
|
super().__init__()
|
||
|
|
self.params = nn.ParameterList([nn.Parameter(torch.randn(10, 10)) for i in range(10)])
|
||
|
|
|
||
|
|
def forward(self, x):
|
||
|
|
# ParameterList can act as an iterable, or be indexed using ints
|
||
|
|
for i, p in enumerate(self.params):
|
||
|
|
x = self.params[i // 2].mm(x) + p.mm(x)
|
||
|
|
return x
|
||
|
|
"""
|
||
|
|
|
||
|
|
def __init__(self, values: Optional[Iterable[Any]] = None) -> None:
|
||
|
|
super().__init__()
|
||
|
|
self._size = 0
|
||
|
|
if values is not None:
|
||
|
|
self += values
|
||
|
|
|
||
|
|
def _get_abs_string_index(self, idx):
|
||
|
|
"""Get the absolute index for the list of modules."""
|
||
|
|
idx = operator.index(idx)
|
||
|
|
if not (-len(self) <= idx < len(self)):
|
||
|
|
raise IndexError(f'index {idx} is out of range')
|
||
|
|
if idx < 0:
|
||
|
|
idx += len(self)
|
||
|
|
return str(idx)
|
||
|
|
|
||
|
|
@overload
|
||
|
|
def __getitem__(self, idx: int) -> Any:
|
||
|
|
...
|
||
|
|
|
||
|
|
@overload
|
||
|
|
def __getitem__(self: T, idx: slice) -> T:
|
||
|
|
...
|
||
|
|
|
||
|
|
def __getitem__(self, idx):
|
||
|
|
if isinstance(idx, slice):
|
||
|
|
start, stop, step = idx.indices(len(self))
|
||
|
|
out = self.__class__()
|
||
|
|
for i in range(start, stop, step):
|
||
|
|
out.append(self[i])
|
||
|
|
return out
|
||
|
|
else:
|
||
|
|
idx = self._get_abs_string_index(idx)
|
||
|
|
return getattr(self, str(idx))
|
||
|
|
|
||
|
|
def __setitem__(self, idx: int, param: Any) -> None:
|
||
|
|
# Note that all other function that add an entry to the list part of
|
||
|
|
# the ParameterList end up here. So this is the only place where we need
|
||
|
|
# to wrap things into Parameter if needed.
|
||
|
|
# Objects added via setattr() are not in the list part and thus won't
|
||
|
|
# call into this function.
|
||
|
|
idx = self._get_abs_string_index(idx)
|
||
|
|
if isinstance(param, torch.Tensor) and not isinstance(param, Parameter):
|
||
|
|
param = Parameter(param)
|
||
|
|
return setattr(self, str(idx), param)
|
||
|
|
|
||
|
|
def __len__(self) -> int:
|
||
|
|
return self._size
|
||
|
|
|
||
|
|
def __iter__(self) -> Iterator[Any]:
|
||
|
|
return iter(self[i] for i in range(len(self)))
|
||
|
|
|
||
|
|
def __iadd__(self, parameters: Iterable[Any]) -> Self:
|
||
|
|
return self.extend(parameters)
|
||
|
|
|
||
|
|
def __dir__(self):
|
||
|
|
keys = super().__dir__()
|
||
|
|
keys = [key for key in keys if not key.isdigit()]
|
||
|
|
return keys
|
||
|
|
|
||
|
|
def append(self, value: Any) -> 'ParameterList':
|
||
|
|
"""Append a given value at the end of the list.
|
||
|
|
|
||
|
|
Args:
|
||
|
|
value (Any): value to append
|
||
|
|
"""
|
||
|
|
new_idx = len(self)
|
||
|
|
self._size += 1
|
||
|
|
self[new_idx] = value
|
||
|
|
return self
|
||
|
|
|
||
|
|
def extend(self, values: Iterable[Any]) -> Self:
|
||
|
|
"""Append values from a Python iterable to the end of the list.
|
||
|
|
|
||
|
|
Args:
|
||
|
|
values (iterable): iterable of values to append
|
||
|
|
"""
|
||
|
|
# Tensor is an iterable but we never want to unpack it here
|
||
|
|
if not isinstance(values, container_abcs.Iterable) or isinstance(values, torch.Tensor):
|
||
|
|
raise TypeError("ParameterList.extend should be called with an "
|
||
|
|
"iterable, but got " + type(values).__name__)
|
||
|
|
for value in values:
|
||
|
|
self.append(value)
|
||
|
|
return self
|
||
|
|
|
||
|
|
def extra_repr(self) -> str:
|
||
|
|
child_lines = []
|
||
|
|
for k, p in enumerate(self):
|
||
|
|
if isinstance(p, torch.Tensor):
|
||
|
|
size_str = 'x'.join(str(size) for size in p.size())
|
||
|
|
if p.device.type in ["cuda", torch._C._get_privateuse1_backend_name()]:
|
||
|
|
device_str = f' ({p.device})'
|
||
|
|
else:
|
||
|
|
device_str = ''
|
||
|
|
parastr = '{} containing: [{} of size {}{}]'.format(
|
||
|
|
"Parameter" if isinstance(p, Parameter) else "Tensor",
|
||
|
|
p.dtype, size_str, device_str)
|
||
|
|
child_lines.append(' (' + str(k) + '): ' + parastr)
|
||
|
|
else:
|
||
|
|
child_lines.append(' (' + str(k) + '): Object of type: ' + type(p).__name__)
|
||
|
|
|
||
|
|
tmpstr = '\n'.join(child_lines)
|
||
|
|
return tmpstr
|
||
|
|
|
||
|
|
def __call__(self, *args, **kwargs):
|
||
|
|
raise RuntimeError('ParameterList should not be called.')
|
||
|
|
|
||
|
|
|
||
|
|
class ParameterDict(Module):
|
||
|
|
r"""Holds parameters in a dictionary.
|
||
|
|
|
||
|
|
ParameterDict can be indexed like a regular Python dictionary, but Parameters it
|
||
|
|
contains are properly registered, and will be visible by all Module methods.
|
||
|
|
Other objects are treated as would be done by a regular Python dictionary
|
||
|
|
|
||
|
|
:class:`~torch.nn.ParameterDict` is an **ordered** dictionary.
|
||
|
|
:meth:`~torch.nn.ParameterDict.update` with other unordered mapping
|
||
|
|
types (e.g., Python's plain ``dict``) does not preserve the order of the
|
||
|
|
merged mapping. On the other hand, ``OrderedDict`` or another :class:`~torch.nn.ParameterDict`
|
||
|
|
will preserve their ordering.
|
||
|
|
|
||
|
|
Note that the constructor, assigning an element of the dictionary and the
|
||
|
|
:meth:`~torch.nn.ParameterDict.update` method will convert any :class:`~torch.Tensor` into
|
||
|
|
:class:`~torch.nn.Parameter`.
|
||
|
|
|
||
|
|
Args:
|
||
|
|
values (iterable, optional): a mapping (dictionary) of
|
||
|
|
(string : Any) or an iterable of key-value pairs
|
||
|
|
of type (string, Any)
|
||
|
|
|
||
|
|
Example::
|
||
|
|
|
||
|
|
class MyModule(nn.Module):
|
||
|
|
def __init__(self):
|
||
|
|
super().__init__()
|
||
|
|
self.params = nn.ParameterDict({
|
||
|
|
'left': nn.Parameter(torch.randn(5, 10)),
|
||
|
|
'right': nn.Parameter(torch.randn(5, 10))
|
||
|
|
})
|
||
|
|
|
||
|
|
def forward(self, x, choice):
|
||
|
|
x = self.params[choice].mm(x)
|
||
|
|
return x
|
||
|
|
"""
|
||
|
|
|
||
|
|
def __init__(self, parameters: Any = None) -> None:
|
||
|
|
super().__init__()
|
||
|
|
self._keys: Dict[str, None] = {}
|
||
|
|
if parameters is not None:
|
||
|
|
self.update(parameters)
|
||
|
|
|
||
|
|
def _key_to_attr(self, key: str) -> str:
|
||
|
|
if not isinstance(key, str):
|
||
|
|
raise TypeError("Index given to ParameterDict cannot be used as a key as it is "
|
||
|
|
f"not a string (type is '{type(key).__name__}'). Open an issue on "
|
||
|
|
"github if you need non-string keys.")
|
||
|
|
else:
|
||
|
|
# Use the key as-is so that `.named_parameters()` returns the right thing
|
||
|
|
return key
|
||
|
|
|
||
|
|
def __getitem__(self, key: str) -> Any:
|
||
|
|
attr = self._key_to_attr(key)
|
||
|
|
return getattr(self, attr)
|
||
|
|
|
||
|
|
def __setitem__(self, key: str, value: Any) -> None:
|
||
|
|
# Note that all other function that add an entry to the dictionary part of
|
||
|
|
# the ParameterDict end up here. So this is the only place where we need
|
||
|
|
# to wrap things into Parameter if needed.
|
||
|
|
# Objects added via setattr() are not in the dictionary part and thus won't
|
||
|
|
# call into this function.
|
||
|
|
self._keys[key] = None
|
||
|
|
attr = self._key_to_attr(key)
|
||
|
|
if isinstance(value, torch.Tensor) and not isinstance(value, Parameter):
|
||
|
|
value = Parameter(value)
|
||
|
|
setattr(self, attr, value)
|
||
|
|
|
||
|
|
def __delitem__(self, key: str) -> None:
|
||
|
|
del self._keys[key]
|
||
|
|
attr = self._key_to_attr(key)
|
||
|
|
delattr(self, attr)
|
||
|
|
|
||
|
|
def __len__(self) -> int:
|
||
|
|
return len(self._keys)
|
||
|
|
|
||
|
|
def __iter__(self) -> Iterator[str]:
|
||
|
|
return iter(self._keys)
|
||
|
|
|
||
|
|
def __reversed__(self) -> Iterator[str]:
|
||
|
|
return reversed(list(self._keys))
|
||
|
|
|
||
|
|
def copy(self) -> 'ParameterDict':
|
||
|
|
"""Return a copy of this :class:`~torch.nn.ParameterDict` instance."""
|
||
|
|
# We have to use an OrderedDict because the ParameterDict constructor
|
||
|
|
# behaves differently on plain dict vs OrderedDict
|
||
|
|
return ParameterDict(OrderedDict((k, self[k]) for k in self._keys))
|
||
|
|
|
||
|
|
def __contains__(self, key: str) -> bool:
|
||
|
|
return key in self._keys
|
||
|
|
|
||
|
|
def setdefault(self, key: str, default: Optional[Any] = None) -> Any:
|
||
|
|
"""Set the default for a key in the Parameterdict.
|
||
|
|
|
||
|
|
If key is in the ParameterDict, return its value.
|
||
|
|
If not, insert `key` with a parameter `default` and return `default`.
|
||
|
|
`default` defaults to `None`.
|
||
|
|
|
||
|
|
Args:
|
||
|
|
key (str): key to set default for
|
||
|
|
default (Any): the parameter set to the key
|
||
|
|
"""
|
||
|
|
if key not in self:
|
||
|
|
self[key] = default
|
||
|
|
return self[key]
|
||
|
|
|
||
|
|
def clear(self) -> None:
|
||
|
|
"""Remove all items from the ParameterDict."""
|
||
|
|
for k in self._keys.copy():
|
||
|
|
del self[k]
|
||
|
|
|
||
|
|
def pop(self, key: str) -> Any:
|
||
|
|
r"""Remove key from the ParameterDict and return its parameter.
|
||
|
|
|
||
|
|
Args:
|
||
|
|
key (str): key to pop from the ParameterDict
|
||
|
|
"""
|
||
|
|
v = self[key]
|
||
|
|
del self[key]
|
||
|
|
return v
|
||
|
|
|
||
|
|
def popitem(self) -> Tuple[str, Any]:
|
||
|
|
"""Remove and return the last inserted `(key, parameter)` pair from the ParameterDict."""
|
||
|
|
k, _ = self._keys.popitem()
|
||
|
|
# We need the key in the _keys to be able to access/del
|
||
|
|
self._keys[k] = None
|
||
|
|
val = self[k]
|
||
|
|
del self[k]
|
||
|
|
return k, val
|
||
|
|
|
||
|
|
def get(self, key: str, default: Optional[Any] = None) -> Any:
|
||
|
|
r"""Return the parameter associated with key if present. Otherwise return default if provided, None if not.
|
||
|
|
|
||
|
|
Args:
|
||
|
|
key (str): key to get from the ParameterDict
|
||
|
|
default (Parameter, optional): value to return if key not present
|
||
|
|
"""
|
||
|
|
return self[key] if key in self else default
|
||
|
|
|
||
|
|
def fromkeys(self, keys: Iterable[str], default: Optional[Any] = None) -> 'ParameterDict':
|
||
|
|
r"""Return a new ParameterDict with the keys provided.
|
||
|
|
|
||
|
|
Args:
|
||
|
|
keys (iterable, string): keys to make the new ParameterDict from
|
||
|
|
default (Parameter, optional): value to set for all keys
|
||
|
|
"""
|
||
|
|
return ParameterDict((k, default) for k in keys)
|
||
|
|
|
||
|
|
def keys(self) -> Iterable[str]:
|
||
|
|
r"""Return an iterable of the ParameterDict keys."""
|
||
|
|
return self._keys.keys()
|
||
|
|
|
||
|
|
def items(self) -> Iterable[Tuple[str, Any]]:
|
||
|
|
r"""Return an iterable of the ParameterDict key/value pairs."""
|
||
|
|
return ((k, self[k]) for k in self._keys)
|
||
|
|
|
||
|
|
def values(self) -> Iterable[Any]:
|
||
|
|
r"""Return an iterable of the ParameterDict values."""
|
||
|
|
return (self[k] for k in self._keys)
|
||
|
|
|
||
|
|
def update(self, parameters: Union[Mapping[str, Any], 'ParameterDict']) -> None:
|
||
|
|
r"""Update the :class:`~torch.nn.ParameterDict` with key-value pairs from ``parameters``, overwriting existing keys.
|
||
|
|
|
||
|
|
.. note::
|
||
|
|
If :attr:`parameters` is an ``OrderedDict``, a :class:`~torch.nn.ParameterDict`, or
|
||
|
|
an iterable of key-value pairs, the order of new elements in it is preserved.
|
||
|
|
|
||
|
|
Args:
|
||
|
|
parameters (iterable): a mapping (dictionary) from string to
|
||
|
|
:class:`~torch.nn.Parameter`, or an iterable of
|
||
|
|
key-value pairs of type (string, :class:`~torch.nn.Parameter`)
|
||
|
|
"""
|
||
|
|
if not isinstance(parameters, container_abcs.Iterable):
|
||
|
|
raise TypeError("ParametersDict.update should be called with an "
|
||
|
|
"iterable of key/value pairs, but got " +
|
||
|
|
type(parameters).__name__)
|
||
|
|
|
||
|
|
if isinstance(parameters, (OrderedDict, ParameterDict)):
|
||
|
|
for key, parameter in parameters.items():
|
||
|
|
self[key] = parameter
|
||
|
|
elif isinstance(parameters, container_abcs.Mapping):
|
||
|
|
for key, parameter in sorted(parameters.items()):
|
||
|
|
self[key] = parameter
|
||
|
|
else:
|
||
|
|
for j, p in enumerate(parameters):
|
||
|
|
if not isinstance(p, container_abcs.Iterable):
|
||
|
|
raise TypeError("ParameterDict update sequence element "
|
||
|
|
"#" + str(j) + " should be Iterable; is" +
|
||
|
|
type(p).__name__)
|
||
|
|
if not len(p) == 2:
|
||
|
|
raise ValueError("ParameterDict update sequence element "
|
||
|
|
"#" + str(j) + " has length " + str(len(p)) +
|
||
|
|
"; 2 is required")
|
||
|
|
# parameters as length-2 list too cumbersome to type, see ModuleDict.update comment
|
||
|
|
self[p[0]] = p[1] # type: ignore[assignment]
|
||
|
|
|
||
|
|
def extra_repr(self) -> str:
|
||
|
|
child_lines = []
|
||
|
|
for k, p in self.items():
|
||
|
|
if isinstance(p, torch.Tensor):
|
||
|
|
size_str = 'x'.join(str(size) for size in p.size())
|
||
|
|
if p.device.type in ["cuda", torch._C._get_privateuse1_backend_name()]:
|
||
|
|
device_str = f' ({p.device})'
|
||
|
|
else:
|
||
|
|
device_str = ''
|
||
|
|
parastr = '{} containing: [{} of size {}{}]'.format(
|
||
|
|
"Parameter" if isinstance(p, Parameter) else "Tensor",
|
||
|
|
torch.typename(p), size_str, device_str)
|
||
|
|
child_lines.append(' (' + str(k) + '): ' + parastr)
|
||
|
|
else:
|
||
|
|
child_lines.append(' (' + str(k) + '): Object of type: ' + type(p).__name__)
|
||
|
|
tmpstr = '\n'.join(child_lines)
|
||
|
|
return tmpstr
|
||
|
|
|
||
|
|
def __call__(self, input):
|
||
|
|
raise RuntimeError('ParameterDict should not be called.')
|
||
|
|
|
||
|
|
def __or__(self, other: 'ParameterDict') -> 'ParameterDict':
|
||
|
|
copy = self.copy()
|
||
|
|
copy.update(other)
|
||
|
|
return copy
|
||
|
|
|
||
|
|
def __ror__(self, other: 'ParameterDict') -> 'ParameterDict':
|
||
|
|
copy = other.copy()
|
||
|
|
copy.update(self)
|
||
|
|
return copy
|
||
|
|
|
||
|
|
def __ior__(self, other : 'ParameterDict') -> Self:
|
||
|
|
self.update(other)
|
||
|
|
return self
|