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# coding=utf-8
# Copyright 2018 Salesforce and HuggingFace Inc. team.
# Copyright (c) 2018, NVIDIA CORPORATION. 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.
""" Salesforce CTRL configuration """
import logging
from .configuration_utils import PretrainedConfig
logger = logging.getLogger(__name__)
CTRL_PRETRAINED_CONFIG_ARCHIVE_MAP = {"ctrl": "https://storage.googleapis.com/sf-ctrl/pytorch/ctrl-config.json"}
class CTRLConfig(PretrainedConfig):
"""
This is the configuration class to store the configuration of an :class:`~transformers.CTRLModel`.
It is used to instantiate an CTRL model according to the specified arguments, defining the model
architecture. Instantiating a configuration with the defaults will yield a similar configuration to that of
the `ctrl <https://huggingface.co/ctrl>`__ architecture from SalesForce.
Configuration objects inherit from :class:`~transformers.PretrainedConfig` and can be used
to control the model outputs. Read the documentation from :class:`~transformers.PretrainedConfig`
for more information.
Args:
vocab_size (:obj:`int`, optional, defaults to 246534):
Vocabulary size of the CTRL model. Defines the different tokens that
can be represented by the `inputs_ids` passed to the forward method of :class:`~transformers.CTRLModel`.
n_positions (:obj:`int`, optional, defaults to 256):
The maximum sequence length that this model might ever be used with.
Typically set this to something large just in case (e.g., 512 or 1024 or 2048).
n_ctx (:obj:`int`, optional, defaults to 256):
Dimensionality of the causal mask (usually same as n_positions).
n_embd (:obj:`int`, optional, defaults to 1280):
Dimensionality of the embeddings and hidden states.
dff (:obj:`int`, optional, defaults to 8192):
Dimensionality of the inner dimension of the FFN.
n_layer (:obj:`int`, optional, defaults to 48):
Number of hidden layers in the Transformer encoder.
n_head (:obj:`int`, optional, defaults to 16):
Number of attention heads for each attention layer in the Transformer encoder.
resid_pdrop (:obj:`float`, optional, defaults to 0.1):
The dropout probability for all fully connected layers in the embeddings, encoder, and pooler.
embd_pdrop (:obj:`int`, optional, defaults to 0.1):
The dropout ratio for the embeddings.
attn_pdrop (:obj:`float`, optional, defaults to 0.1):
The dropout ratio for the attention.
layer_norm_epsilon (:obj:`float`, optional, defaults to 1e-6):
The epsilon to use in the layer normalization layers
initializer_range (:obj:`float`, optional, defaults to 0.02):
The standard deviation of the truncated_normal_initializer for initializing all weight matrices.
Example::
from transformers import CTRLModel, CTRLConfig
# Initializing a CTRL configuration
configuration = CTRLConfig()
# Initializing a model from the configuration
model = CTRLModel(configuration)
# Accessing the model configuration
configuration = model.config
Attributes:
pretrained_config_archive_map (Dict[str, str]):
A dictionary containing all the available pre-trained checkpoints.
"""
pretrained_config_archive_map = CTRL_PRETRAINED_CONFIG_ARCHIVE_MAP
model_type = "ctrl"
def __init__(
self,
vocab_size=246534,
n_positions=256,
n_ctx=256,
n_embd=1280,
dff=8192,
n_layer=48,
n_head=16,
resid_pdrop=0.1,
embd_pdrop=0.1,
attn_pdrop=0.1,
layer_norm_epsilon=1e-6,
initializer_range=0.02,
summary_type="cls_index",
summary_use_proj=True,
summary_activation=None,
summary_proj_to_labels=True,
summary_first_dropout=0.1,
**kwargs
):
super().__init__(**kwargs)
self.vocab_size = vocab_size
self.n_ctx = n_ctx
self.n_positions = n_positions
self.n_embd = n_embd
self.n_layer = n_layer
self.n_head = n_head
self.dff = dff
self.resid_pdrop = resid_pdrop
self.embd_pdrop = embd_pdrop
self.attn_pdrop = attn_pdrop
self.layer_norm_epsilon = layer_norm_epsilon
self.initializer_range = initializer_range
self.summary_type = summary_type
self.summary_use_proj = summary_use_proj
self.summary_activation = summary_activation
self.summary_first_dropout = summary_first_dropout
self.summary_proj_to_labels = summary_proj_to_labels
@property
def max_position_embeddings(self):
return self.n_positions
@property
def hidden_size(self):
return self.n_embd
@property
def num_attention_heads(self):
return self.n_head
@property
def num_hidden_layers(self):
return self.n_layer
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