#下面程序运行时报错：
C:\Users\Administrator\AppData\Local\Programs\Python\Python312\python.exe C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\site-packages\transformers\utils\generic.py
Traceback (most recent call last):
File "C:\Users\Administrator\AppData\Local\Programs\Python\Python312\Lib\site-packages\transformers\utils\generic.py", line 34, in <module>
from ..utils import logging
ImportError: attempted relative import with no known parent package
进程已结束，退出代码为 1
------------------------------------------------------------------------------------------------
import inspect
import json
import os
import tempfile
import warnings
from collections import OrderedDict, UserDict, defaultdict
from collections.abc import Iterable, MutableMapping
from contextlib import ExitStack, contextmanager
from dataclasses import dataclass, fields, is_dataclass
from enum import Enum
from functools import partial, wraps
from typing import Any, Callable, ContextManager, Optional, TypedDict
import numpy as np
from packaging import version
from ..utils import logging
from .import_utils import (
get_torch_version,
is_flax_available,
is_mlx_available,
is_tf_available,
is_torch_available,
is_torch_fx_proxy,
requires,
)
_CAN_RECORD_REGISTRY = {}
logger = logging.get_logger(__name__)
if is_torch_available():
# required for @can_return_tuple decorator to work with torchdynamo
import torch # noqa: F401
from ..model_debugging_utils import model_addition_debugger_context
class cached_property(property):
"""
Descriptor that mimics @property but caches output in member variable.
From tensorflow_datasets
Built-in in functools from Python 3.8.
"""
def __get__(self, obj, objtype=None):
# See docs.python.org/3/howto/descriptor.html#properties
if obj is None:
return self
if self.fget is None:
raise AttributeError("unreadable attribute")
attr = "__cached_" + self.fget.__name__
cached = getattr(obj, attr, None)
if cached is None:
cached = self.fget(obj)
setattr(obj, attr, cached)
return cached
# vendored from distutils.util
def strtobool(val):
"""Convert a string representation of truth to true (1) or false (0).
True values are 'y', 'yes', 't', 'true', 'on', and '1'; false values are 'n', 'no', 'f', 'false', 'off', and '0'.
Raises ValueError if 'val' is anything else.
"""
val = val.lower()
if val in {"y", "yes", "t", "true", "on", "1"}:
return 1
if val in {"n", "no", "f", "false", "off", "0"}:
return 0
raise ValueError(f"invalid truth value {val!r}")
def infer_framework_from_repr(x):
"""
Tries to guess the framework of an object `x` from its repr (brittle but will help in `is_tensor` to try the
frameworks in a smart order, without the need to import the frameworks).
"""
representation = str(type(x))
if representation.startswith("<class 'torch."):
return "pt"
elif representation.startswith("<class 'tensorflow."):
return "tf"
elif representation.startswith("<class 'jax"):
return "jax"
elif representation.startswith("<class 'numpy."):
return "np"
elif representation.startswith("<class 'mlx."):
return "mlx"
def _get_frameworks_and_test_func(x):
"""
Returns an (ordered since we are in Python 3.7+) dictionary framework to test function, which places the framework
we can guess from the repr first, then Numpy, then the others.
"""
framework_to_test = {
"pt": is_torch_tensor,
"tf": is_tf_tensor,
"jax": is_jax_tensor,
"np": is_numpy_array,
"mlx": is_mlx_array,
}
preferred_framework = infer_framework_from_repr(x)
# We will test this one first, then numpy, then the others.
frameworks = [] if preferred_framework is None else [preferred_framework]
if preferred_framework != "np":
frameworks.append("np")
frameworks.extend([f for f in framework_to_test if f not in [preferred_framework, "np"]])
return {f: framework_to_test[f] for f in frameworks}
def is_tensor(x):
"""
Tests if `x` is a `torch.Tensor`, `tf.Tensor`, `jaxlib.xla_extension.DeviceArray`, `np.ndarray` or `mlx.array`
in the order defined by `infer_framework_from_repr`
"""
# This gives us a smart order to test the frameworks with the corresponding tests.
framework_to_test_func = _get_frameworks_and_test_func(x)
for test_func in framework_to_test_func.values():
if test_func(x):
return True
# Tracers
if is_torch_fx_proxy(x):
return True
if is_flax_available():
from jax.core import Tracer
if isinstance(x, Tracer):
return True
return False
def _is_numpy(x):
return isinstance(x, np.ndarray)
def is_numpy_array(x):
"""
Tests if `x` is a numpy array or not.
"""
return _is_numpy(x)
def _is_torch(x):
import torch
return isinstance(x, torch.Tensor)
def is_torch_tensor(x):
"""
Tests if `x` is a torch tensor or not. Safe to call even if torch is not installed.
"""
return False if not is_torch_available() else _is_torch(x)
def _is_torch_device(x):
import torch
return isinstance(x, torch.device)
def is_torch_device(x):
"""
Tests if `x` is a torch device or not. Safe to call even if torch is not installed.
"""
return False if not is_torch_available() else _is_torch_device(x)
def _is_torch_dtype(x):
import torch
if isinstance(x, str):
if hasattr(torch, x):
x = getattr(torch, x)
else:
return False
return isinstance(x, torch.dtype)
def is_torch_dtype(x):
"""
Tests if `x` is a torch dtype or not. Safe to call even if torch is not installed.
"""
return False if not is_torch_available() else _is_torch_dtype(x)
def _is_tensorflow(x):
import tensorflow as tf
return isinstance(x, tf.Tensor)
def is_tf_tensor(x):
"""
Tests if `x` is a tensorflow tensor or not. Safe to call even if tensorflow is not installed.
"""
return False if not is_tf_available() else _is_tensorflow(x)
def _is_tf_symbolic_tensor(x):
import tensorflow as tf
# the `is_symbolic_tensor` predicate is only available starting with TF 2.14
if hasattr(tf, "is_symbolic_tensor"):
return tf.is_symbolic_tensor(x)
return isinstance(x, tf.Tensor)
def is_tf_symbolic_tensor(x):
"""
Tests if `x` is a tensorflow symbolic tensor or not (ie. not eager). Safe to call even if tensorflow is not
installed.
"""
return False if not is_tf_available() else _is_tf_symbolic_tensor(x)
def _is_jax(x):
import jax.numpy as jnp # noqa: F811
return isinstance(x, jnp.ndarray)
def is_jax_tensor(x):
"""
Tests if `x` is a Jax tensor or not. Safe to call even if jax is not installed.
"""
return False if not is_flax_available() else _is_jax(x)
def _is_mlx(x):
import mlx.core as mx
return isinstance(x, mx.array)
def is_mlx_array(x):
"""
Tests if `x` is a mlx array or not. Safe to call even when mlx is not installed.
"""
return False if not is_mlx_available() else _is_mlx(x)
def to_py_obj(obj):
"""
Convert a TensorFlow tensor, PyTorch tensor, Numpy array or python list to a python list.
"""
if isinstance(obj, (int, float)):
return obj
elif isinstance(obj, (dict, UserDict)):
return {k: to_py_obj(v) for k, v in obj.items()}
elif isinstance(obj, (list, tuple)):
try:
arr = np.array(obj)
if np.issubdtype(arr.dtype, np.integer) or np.issubdtype(arr.dtype, np.floating):
return arr.tolist()
except Exception:
pass
return [to_py_obj(o) for o in obj]
framework_to_py_obj = {
"pt": lambda obj: obj.tolist(),
"tf": lambda obj: obj.numpy().tolist(),
"jax": lambda obj: np.asarray(obj).tolist(),
"np": lambda obj: obj.tolist(),
}
# This gives us a smart order to test the frameworks with the corresponding tests.
framework_to_test_func = _get_frameworks_and_test_func(obj)
for framework, test_func in framework_to_test_func.items():
if test_func(obj):
return framework_to_py_obj[framework](obj)
# tolist also works on 0d np arrays
if isinstance(obj, np.number):
return obj.tolist()
else:
return obj
def to_numpy(obj):
"""
Convert a TensorFlow tensor, PyTorch tensor, Numpy array or python list to a Numpy array.
"""
framework_to_numpy = {
"pt": lambda obj: obj.detach().cpu().numpy(),
"tf": lambda obj: obj.numpy(),
"jax": lambda obj: np.asarray(obj),
"np": lambda obj: obj,
}
if isinstance(obj, (dict, UserDict)):
return {k: to_numpy(v) for k, v in obj.items()}
elif isinstance(obj, (list, tuple)):
return np.array(obj)
# This gives us a smart order to test the frameworks with the corresponding tests.
framework_to_test_func = _get_frameworks_and_test_func(obj)
for framework, test_func in framework_to_test_func.items():
if test_func(obj):
return framework_to_numpy[framework](obj)
return obj
class ModelOutput(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 `ModelOutput` directly. Use the [`~utils.ModelOutput.to_tuple`] method to convert it to a tuple
before.
</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():
if version.parse(get_torch_version()) >= version.parse("2.2"):
from torch.utils._pytree import register_pytree_node
register_pytree_node(
cls,
_model_output_flatten,
partial(_model_output_unflatten, output_type=cls),
serialized_type_name=f"{cls.__module__}.{cls.__name__}",
)
else:
from torch.utils._pytree import _register_pytree_node
_register_pytree_node(
cls,
_model_output_flatten,
partial(_model_output_unflatten, output_type=cls),
)
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
# Subclasses of ModelOutput must use the @dataclass decorator
# This check is done in __init__ because the @dataclass decorator operates after __init_subclass__
# issubclass() would return True for issubclass(ModelOutput, ModelOutput) when False is needed
# Just need to check that the current class is not ModelOutput
is_modeloutput_subclass = self.__class__ != ModelOutput
if is_modeloutput_subclass and not is_dataclass(self):
raise TypeError(
f"{self.__module__}.{self.__class__.__name__} is not a dataclass."
" This is a subclass of ModelOutput and so must use the @dataclass decorator."
)
def __post_init__(self):
"""Check the ModelOutput dataclass.
Only occurs if @dataclass decorator has been used.
"""
class_fields = fields(self)
# Safety and consistency checks
if not len(class_fields):
raise ValueError(f"{self.__class__.__name__} has no fields.")
if not all(field.default is None for field in class_fields[1:]):
raise ValueError(f"{self.__class__.__name__} should not have more than one required field.")
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 not is_tensor(first_field):
if isinstance(first_field, dict):
iterator = first_field.items()
first_field_iterator = True
else:
try:
iterator = iter(first_field)
first_field_iterator = True
except TypeError:
first_field_iterator = False
# if we provided an iterator as first field and the iterator is a (key, value) iterator
# set the associated fields
if first_field_iterator:
for idx, element in enumerate(iterator):
if not isinstance(element, (list, tuple)) or len(element) != 2 or not isinstance(element[0], str):
if idx == 0:
# If we do not have an iterator of key/values, set it as attribute
self[class_fields[0].name] = first_field
else:
# If we have a mixed iterator, raise an error
raise ValueError(
f"Cannot set key/value for {element}. It needs to be a tuple (key, value)."
)
break
setattr(self, element[0], element[1])
if element[1] is not None:
self[element[0]] = element[1]
elif first_field is not None:
self[class_fields[0].name] = first_field
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())
if is_torch_available():
import torch.utils._pytree as _torch_pytree
def _model_output_flatten(output: ModelOutput) -> tuple[list[Any], "_torch_pytree.Context"]:
return list(output.values()), list(output.keys())
def _model_output_unflatten(
values: Iterable[Any],
context: "_torch_pytree.Context",
output_type=None,
) -> ModelOutput:
return output_type(**dict(zip(context, values)))
if version.parse(get_torch_version()) >= version.parse("2.2"):
_torch_pytree.register_pytree_node(
ModelOutput,
_model_output_flatten,
partial(_model_output_unflatten, output_type=ModelOutput),
serialized_type_name=f"{ModelOutput.__module__}.{ModelOutput.__name__}",
)
else:
_torch_pytree._register_pytree_node(
ModelOutput,
_model_output_flatten,
partial(_model_output_unflatten, output_type=ModelOutput),
)
class ExplicitEnum(str, Enum):
"""
Enum with more explicit error message for missing values.
"""
@classmethod
def _missing_(cls, value):
raise ValueError(
f"{value} is not a valid {cls.__name__}, please select one of {list(cls._value2member_map_.keys())}"
)
class PaddingStrategy(ExplicitEnum):
"""
Possible values for the `padding` argument in [`PreTrainedTokenizerBase.__call__`]. Useful for tab-completion in an
IDE.
"""
LONGEST = "longest"
MAX_LENGTH = "max_length"
DO_NOT_PAD = "do_not_pad"
class TensorType(ExplicitEnum):
"""
Possible values for the `return_tensors` argument in [`PreTrainedTokenizerBase.__call__`]. Useful for
tab-completion in an IDE.
"""
PYTORCH = "pt"
TENSORFLOW = "tf"
NUMPY = "np"
JAX = "jax"
MLX = "mlx"
class ContextManagers:
"""
Wrapper for `contextlib.ExitStack` which enters a collection of context managers. Adaptation of `ContextManagers`
in the `fastcore` library.
"""
def __init__(self, context_managers: list[ContextManager]):
self.context_managers = context_managers
self.stack = ExitStack()
def __enter__(self):
for context_manager in self.context_managers:
self.stack.enter_context(context_manager)
def __exit__(self, *args, **kwargs):
self.stack.__exit__(*args, **kwargs)
def can_return_loss(model_class):
"""
Check if a given model can return loss.
Args:
model_class (`type`): The class of the model.
"""
framework = infer_framework(model_class)
if framework == "tf":
signature = inspect.signature(model_class.call) # TensorFlow models
elif framework == "pt":
signature = inspect.signature(model_class.forward) # PyTorch models
else:
signature = inspect.signature(model_class.__call__) # Flax models
for p in signature.parameters:
if p == "return_loss" and signature.parameters[p].default is True:
return True
return False
def find_labels(model_class):
"""
Find the labels used by a given model.
Args:
model_class (`type`): The class of the model.
"""
model_name = model_class.__name__
framework = infer_framework(model_class)
if framework == "tf":
signature = inspect.signature(model_class.call) # TensorFlow models
elif framework == "pt":
signature = inspect.signature(model_class.forward) # PyTorch models
else:
signature = inspect.signature(model_class.__call__) # Flax models
if "QuestionAnswering" in model_name:
return [p for p in signature.parameters if "label" in p or p in ("start_positions", "end_positions")]
else:
return [p for p in signature.parameters if "label" in p]
def flatten_dict(d: MutableMapping, parent_key: str = "", delimiter: str = "."):
"""Flatten a nested dict into a single level dict."""
def _flatten_dict(d, parent_key="", delimiter="."):
for k, v in d.items():
key = str(parent_key) + delimiter + str(k) if parent_key else k
if v and isinstance(v, MutableMapping):
yield from flatten_dict(v, key, delimiter=delimiter).items()
else:
yield key, v
return dict(_flatten_dict(d, parent_key, delimiter))
@contextmanager
def working_or_temp_dir(working_dir, use_temp_dir: bool = False):
if use_temp_dir:
with tempfile.TemporaryDirectory() as tmp_dir:
yield tmp_dir
else:
yield working_dir
def transpose(array, axes=None):
"""
Framework-agnostic version of `numpy.transpose` that will work on torch/TensorFlow/Jax tensors as well as NumPy
arrays.
"""
if is_numpy_array(array):
return np.transpose(array, axes=axes)
elif is_torch_tensor(array):
return array.T if axes is None else array.permute(*axes)
elif is_tf_tensor(array):
import tensorflow as tf
return tf.transpose(array, perm=axes)
elif is_jax_tensor(array):
import jax.numpy as jnp
return jnp.transpose(array, axes=axes)
else:
raise ValueError(f"Type not supported for transpose: {type(array)}.")
def reshape(array, newshape):
"""
Framework-agnostic version of `numpy.reshape` that will work on torch/TensorFlow/Jax tensors as well as NumPy
arrays.
"""
if is_numpy_array(array):
return np.reshape(array, newshape)
elif is_torch_tensor(array):
return array.reshape(*newshape)
elif is_tf_tensor(array):
import tensorflow as tf
return tf.reshape(array, newshape)
elif is_jax_tensor(array):
import jax.numpy as jnp
return jnp.reshape(array, newshape)
else:
raise ValueError(f"Type not supported for reshape: {type(array)}.")
def squeeze(array, axis=None):
"""
Framework-agnostic version of `numpy.squeeze` that will work on torch/TensorFlow/Jax tensors as well as NumPy
arrays.
"""
if is_numpy_array(array):
return np.squeeze(array, axis=axis)
elif is_torch_tensor(array):
return array.squeeze() if axis is None else array.squeeze(dim=axis)
elif is_tf_tensor(array):
import tensorflow as tf
return tf.squeeze(array, axis=axis)
elif is_jax_tensor(array):
import jax.numpy as jnp
return jnp.squeeze(array, axis=axis)
else:
raise ValueError(f"Type not supported for squeeze: {type(array)}.")
def expand_dims(array, axis):
"""
Framework-agnostic version of `numpy.expand_dims` that will work on torch/TensorFlow/Jax tensors as well as NumPy
arrays.
"""
if is_numpy_array(array):
return np.expand_dims(array, axis)
elif is_torch_tensor(array):
return array.unsqueeze(dim=axis)
elif is_tf_tensor(array):
import tensorflow as tf
return tf.expand_dims(array, axis=axis)
elif is_jax_tensor(array):
import jax.numpy as jnp
return jnp.expand_dims(array, axis=axis)
else:
raise ValueError(f"Type not supported for expand_dims: {type(array)}.")
def tensor_size(array):
"""
Framework-agnostic version of `numpy.size` that will work on torch/TensorFlow/Jax tensors as well as NumPy arrays.
"""
if is_numpy_array(array):
return np.size(array)
elif is_torch_tensor(array):
return array.numel()
elif is_tf_tensor(array):
import tensorflow as tf
return tf.size(array)
elif is_jax_tensor(array):
return array.size
else:
raise ValueError(f"Type not supported for tensor_size: {type(array)}.")
def infer_framework(model_class):
"""
Infers the framework of a given model without using isinstance(), because we cannot guarantee that the relevant
classes are imported or available.
"""
for base_class in inspect.getmro(model_class):
module = base_class.__module__
name = base_class.__name__
if module.startswith("tensorflow") or module.startswith("keras") or name == "TFPreTrainedModel":
return "tf"
elif module.startswith("torch") or name == "PreTrainedModel":
return "pt"
elif module.startswith("flax") or module.startswith("jax") or name == "FlaxPreTrainedModel":
return "flax"
else:
raise TypeError(f"Could not infer framework from class {model_class}.")
def torch_int(x):
"""
Casts an input to a torch int64 tensor if we are in a tracing context, otherwise to a Python int.
"""
if not is_torch_available():
return int(x)
import torch
return x.to(torch.int64) if torch.jit.is_tracing() and isinstance(x, torch.Tensor) else int(x)
def torch_float(x):
"""
Casts an input to a torch float32 tensor if we are in a tracing context, otherwise to a Python float.
"""
if not is_torch_available():
return int(x)
import torch
return x.to(torch.float32) if torch.jit.is_tracing() and isinstance(x, torch.Tensor) else int(x)
def filter_out_non_signature_kwargs(extra: Optional[list] = None):
"""
Decorator to filter out named arguments that are not in the function signature.
This decorator ensures that only the keyword arguments that match the function's signature, or are specified in the
`extra` list, are passed to the function. Any additional keyword arguments are filtered out and a warning is issued.
Parameters:
extra (`Optional[list]`, *optional*):
A list of extra keyword argument names that are allowed even if they are not in the function's signature.
Returns:
Callable:
A decorator that wraps the function and filters out invalid keyword arguments.
Example usage:
```python
@filter_out_non_signature_kwargs(extra=["allowed_extra_arg"])
def my_function(arg1, arg2, **kwargs):
print(arg1, arg2, kwargs)
my_function(arg1=1, arg2=2, allowed_extra_arg=3, invalid_arg=4)
# This will print: 1 2 {"allowed_extra_arg": 3}
# And issue a warning: "The following named arguments are not valid for `my_function` and were ignored: 'invalid_arg'"
```
"""
extra = extra or []
extra_params_to_pass = set(extra)
def decorator(func):
sig = inspect.signature(func)
function_named_args = set(sig.parameters.keys())
valid_kwargs_to_pass = function_named_args.union(extra_params_to_pass)
# Required for better warning message
is_instance_method = "self" in function_named_args
is_class_method = "cls" in function_named_args
# Mark function as decorated
func._filter_out_non_signature_kwargs = True
@wraps(func)
def wrapper(*args, **kwargs):
valid_kwargs = {}
invalid_kwargs = {}
for k, v in kwargs.items():
if k in valid_kwargs_to_pass:
valid_kwargs[k] = v
else:
invalid_kwargs[k] = v
if invalid_kwargs:
invalid_kwargs_names = [f"'{k}'" for k in invalid_kwargs]
invalid_kwargs_names = ", ".join(invalid_kwargs_names)
# Get the class name for better warning message
if is_instance_method:
cls_prefix = args[0].__class__.__name__ + "."
elif is_class_method:
cls_prefix = args[0].__name__ + "."
else:
cls_prefix = ""
warnings.warn(
f"The following named arguments are not valid for `{cls_prefix}{func.__name__}`"
f" and were ignored: {invalid_kwargs_names}",
UserWarning,
stacklevel=2,
)
return func(*args, **valid_kwargs)
return wrapper
return decorator
class TransformersKwargs(TypedDict, total=False):
"""
Keyword arguments to be passed to the loss function
Attributes:
num_items_in_batch (`Optional[torch.Tensor]`, *optional*):
Number of items in the batch. It is recommended to pass it when
you are doing gradient accumulation.
output_hidden_states (`Optional[bool]`, *optional*):
Most of the models support outputing all hidden states computed during the forward pass.
output_attentions (`Optional[bool]`, *optional*):
Turn this on to return the intermediary attention scores.
output_router_logits (`Optional[bool]`, *optional*):
For MoE models, this allows returning the router logits to compute the loss.
cumulative_seqlens_q (`torch.LongTensor`, *optional*)
Gets cumulative sequence length for query state.
cumulative_seqlens_k (`torch.LongTensor`, *optional*)
Gets cumulative sequence length for key state.
max_length_q (`int`, *optional*):
Maximum sequence length for query state.
max_length_k (`int`, *optional*):
Maximum sequence length for key state.
"""
num_items_in_batch: Optional["torch.Tensor"]
output_hidden_states: Optional[bool]
output_attentions: Optional[bool]
output_router_logits: Optional[bool]
cumulative_seqlens_q: Optional["torch.LongTensor"]
cumulative_seqlens_k: Optional["torch.LongTensor"]
max_length_q: Optional[int]
max_length_k: Optional[int]
def is_timm_config_dict(config_dict: dict[str, Any]) -> bool:
"""Checks whether a config dict is a timm config dict."""
return "pretrained_cfg" in config_dict
def is_timm_local_checkpoint(pretrained_model_path: str) -> bool:
"""
Checks whether a checkpoint is a timm model checkpoint.
"""
if pretrained_model_path is None:
return False
# in case it's Path, not str
pretrained_model_path = str(pretrained_model_path)
is_file = os.path.isfile(pretrained_model_path)
is_dir = os.path.isdir(pretrained_model_path)
# pretrained_model_path is a file
if is_file and pretrained_model_path.endswith(".json"):
with open(pretrained_model_path) as f:
config_dict = json.load(f)
return is_timm_config_dict(config_dict)
# pretrained_model_path is a directory with a config.json
if is_dir and os.path.exists(os.path.join(pretrained_model_path, "config.json")):
with open(os.path.join(pretrained_model_path, "config.json")) as f:
config_dict = json.load(f)
return is_timm_config_dict(config_dict)
return False
def set_attribute_for_modules(module: "torch.nn.Module", key: str, value: Any):
"""
Set a value to a module and all submodules.
"""
setattr(module, key, value)
for submodule in module.children():
set_attribute_for_modules(submodule, key, value)
def del_attribute_from_modules(module: "torch.nn.Module", key: str):
"""
Delete a value from a module and all submodules.
"""
# because we might remove it previously in case it's a shared module, e.g. activation function
if hasattr(module, key):
delattr(module, key)
for submodule in module.children():
del_attribute_from_modules(submodule, key)
def can_return_tuple(func):
"""
Decorator to wrap model method, to call output.to_tuple() if return_dict=False passed as a kwarg or
use_return_dict=False is set in the config.
Note:
output.to_tuple() convert output to tuple skipping all `None` values.
"""
@wraps(func)
def wrapper(self, *args, **kwargs):
return_dict = self.config.return_dict if hasattr(self, "config") else True
return_dict_passed = kwargs.pop("return_dict", return_dict)
if return_dict_passed is not None:
return_dict = return_dict_passed
output = func(self, *args, **kwargs)
if not return_dict and not isinstance(output, tuple):
output = output.to_tuple()
return output
return wrapper
# if is_torch_available():
# @torch._dynamo.disable
@dataclass
@requires(backends=("torch",))
class OutputRecorder:
"""
Configuration for recording outputs from a model via hooks.
Attributes:
target_class (Type): The class (e.g., nn.Module) to which the hook will be attached.
index (Optional[int]): If the output is a tuple/list, optionally record only at a specific index.
layer_name (Optional[str]): Name of the submodule to target (if needed), e.g., "transformer.layer.3.attn".
class_name (Optional[str]): Name of the class to which the hook will be attached. Could be the suffix of class name in some cases.
"""
target_class: "type[torch.nn.Module]"
index: Optional[int] = 0
layer_name: Optional[str] = None
class_name: Optional[str] = None
def check_model_inputs(func):
"""
Decorator to intercept specific layer outputs without using hooks.
Compatible with torch.compile (Dynamo tracing).
"""
@wraps(func)
def wrapper(self, *args, **kwargs):
use_cache = kwargs.get("use_cache")
if use_cache is None:
use_cache = getattr(self.config, "use_cache", False)
return_dict = kwargs.pop("return_dict", None)
if return_dict is None:
return_dict = getattr(self.config, "return_dict", True)
if getattr(self, "gradient_checkpointing", False) and self.training and use_cache:
logger.warning_once(
"`use_cache=True` is incompatible with gradient checkpointing. Setting `use_cache=False`."
)
use_cache = False
kwargs["use_cache"] = use_cache
all_args = kwargs.copy()
if "kwargs" in all_args:
for k, v in all_args["kwargs"].items():
all_args[k] = v
capture_flags = _CAN_RECORD_REGISTRY.get(str(self.__class__), {}) # there is a weak ref for executorch
recordable_keys = {
f"output_{k}": all_args.get(
f"output_{k}",
getattr(
self.config,
f"output_{k}",
all_args.get("output_attentions", getattr(self.config, "output_attentions", False)),
),
)
for k in capture_flags
}
collected_outputs = defaultdict(tuple)
monkey_patched_layers = []
def make_capture_wrapper(module, orig_forward, key, index):
@wraps(orig_forward)
def wrapped_forward(*args, **kwargs):
if key == "hidden_states" and len(collected_outputs[key]) == 0:
collected_outputs[key] += (args[0],)
if kwargs.get("debug_io", False):
with model_addition_debugger_context(
module, kwargs.get("debug_io_dir", "~/model_debug"), kwargs.get("prune_layers")
):
output = orig_forward(*args, **kwargs)
else:
output = orig_forward(*args, **kwargs)
if not isinstance(output, tuple):
collected_outputs[key] += (output,)
elif output[index] is not None:
if key not in collected_outputs:
collected_outputs[key] = (output[index],)
else:
collected_outputs[key] += (output[index],)
return output
return wrapped_forward
if any(recordable_keys.values()):
capture_tasks = []
for key, layer_specs in capture_flags.items():
if not recordable_keys.get(f"output_{key}", False):
continue
if not isinstance(layer_specs, list):
layer_specs = [layer_specs]
for specs in layer_specs:
if not isinstance(specs, OutputRecorder):
index = 0 if "hidden_states" in key else 1
class_name = None if not isinstance(specs, str) else specs
target_class = specs if not isinstance(specs, str) else None
specs = OutputRecorder(target_class=target_class, index=index, class_name=class_name)
capture_tasks.append((key, specs))
for name, module in self.named_modules():
for key, specs in capture_tasks:
# The second check is for multimodals where only backbone layer suffix is available
if (specs.target_class is not None and isinstance(module, specs.target_class)) or (
specs.class_name is not None and name.endswith(specs.class_name)
):
if specs.layer_name is not None and specs.layer_name not in name:
continue
# Monkey patch forward
original_forward = module.forward
module.forward = make_capture_wrapper(module, original_forward, key, specs.index)
monkey_patched_layers.append((module, original_forward))
outputs = func(self, *args, **kwargs)
# Restore original forward methods
for module, original_forward in monkey_patched_layers:
module.forward = original_forward
# Inject collected outputs into model output
for key in collected_outputs:
if key == "hidden_states":
collected_outputs[key] = collected_outputs[key][:-1]
if hasattr(outputs, "vision_hidden_states"):
collected_outputs[key] += (outputs.vision_hidden_states,)
elif hasattr(outputs, "last_hidden_state"):
collected_outputs[key] += (outputs.last_hidden_state,)
outputs[key] = collected_outputs[key]
elif key == "attentions":
if isinstance(capture_flags[key], list) and len(capture_flags[key]) == 2:
outputs[key] = collected_outputs[key][0::2]
outputs["cross_" + key] = collected_outputs[key][1::2]
else:
outputs[key] = collected_outputs[key]
else:
outputs[key] = collected_outputs[key]
if return_dict is False:
outputs = outputs.to_tuple()
return outputs
return wrapper
class GeneralInterface(MutableMapping):
"""
Dict-like object keeping track of a class-wide mapping, as well as a local one. Allows to have library-wide
modifications though the class mapping, as well as local modifications in a single file with the local mapping.
"""
# Class instance object, so that a call to `register` can be reflected into all other files correctly, even if
# a new instance is created (in order to locally override a given function)
_global_mapping = {}
def __init__(self):
self._local_mapping = {}
def __getitem__(self, key):
# First check if instance has a local override
if key in self._local_mapping:
return self._local_mapping[key]
return self._global_mapping[key]
def __setitem__(self, key, value):
# Allow local update of the default functions without impacting other instances
self._local_mapping.update({key: value})
def __delitem__(self, key):
del self._local_mapping[key]
def __iter__(self):
# Ensure we use all keys, with the overwritten ones on top
return iter({**self._global_mapping, **self._local_mapping})
def __len__(self):
return len(self._global_mapping.keys() | self._local_mapping.keys())
@classmethod
def register(cls, key: str, value: Callable):
cls._global_mapping.update({key: value})
def valid_keys(self) -> list[str]:
return list(self.keys())
本文详细介绍了Python中的super()函数，包括其原理和用法。super()用于调用父类和兄弟类的方法，遵循MRO（Method Resolution Order）方法解析顺序。通过示例展示了super()如何在类的继承结构中找到正确的方法执行路径，以及在实际代码中的应用。文章还通过一个具体的例子解释了D类调用fun方法时，如何按照MRO顺序依次调用各父类的fun方法。
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