tf_predictions.ipynb

Kernel: Unknown Kernel

This notebook regroups the code sample of the video below, which is a part of the Hugging Face course.

#@title
from IPython.display import HTML

HTML('<iframe width="560" height="315" src="https://www.youtube.com/embed/nx10eh4CoOs?rel=0&amp;controls=0&amp;showinfo=0" frameborder="0" allowfullscreen></iframe>')

Install the Transformers and Datasets libraries to run this notebook.

! pip install datasets transformers[sentencepiece]

from datasets import load_dataset
from transformers import AutoTokenizer
import numpy as np

raw_datasets = load_dataset("glue", "mrpc")
checkpoint = "bert-base-uncased"
tokenizer = AutoTokenizer.from_pretrained(checkpoint)

def tokenize_dataset(dataset):
    encoded = tokenizer(
        dataset["sentence1"],
        dataset["sentence2"],
        padding=True,
        truncation=True,
        return_tensors='np',
    )
    return encoded.data

tokenized_datasets = {
    split: tokenize_dataset(raw_datasets[split]) for split in raw_datasets.keys()
}
train_tokens = tokenized_datasets['train']['input_ids']

Reusing dataset glue (/home/sgugger/.cache/huggingface/datasets/glue/mrpc/1.0.0/dacbe3125aa31d7f70367a07a8a9e72a5a0bfeb5fc42e75c9db75b96da6053ad)

import tensorflow as tf
from transformers import TFAutoModelForSequenceClassification

checkpoint = 'bert-base-cased'
model = TFAutoModelForSequenceClassification.from_pretrained(checkpoint, num_labels=2)
loss = tf.keras.losses.SparseCategoricalCrossentropy(from_logits=True)

All model checkpoint layers were used when initializing TFBertForSequenceClassification.

Some layers of TFBertForSequenceClassification were not initialized from the model checkpoint at bert-base-cased and are newly initialized: ['classifier']
You should probably TRAIN this model on a down-stream task to be able to use it for predictions and inference.

from tensorflow.keras.optimizers.schedules import PolynomialDecay

batch_size = 8
num_epochs = 3
num_train_steps = (len(train_tokens) // batch_size) * num_epochs
lr_scheduler = PolynomialDecay(
    initial_learning_rate=5e-5,
    end_learning_rate=0.,
    decay_steps=num_train_steps
)

from tensorflow.keras.optimizers import Adam

opt = Adam(learning_rate=lr_scheduler)
model.compile(loss=loss, optimizer=opt)

model.fit(
    tokenized_datasets['train'],
    np.array(raw_datasets['train']['label']), 
    validation_data=(tokenized_datasets['validation'], np.array(raw_datasets['validation']['label'])),
    batch_size=8,
    epochs=3
)

Epoch 1/3
WARNING:tensorflow:The parameters `output_attentions`, `output_hidden_states` and `use_cache` cannot be updated when calling a model.They have to be set to True/False in the config object (i.e.: `config=XConfig.from_pretrained('name', output_attentions=True)`).
WARNING:tensorflow:AutoGraph could not transform <bound method Socket.send of <zmq.sugar.socket.Socket object at 0x7f5b279ce050>> and will run it as-is.
Please report this to the TensorFlow team. When filing the bug, set the verbosity to 10 (on Linux, `export AUTOGRAPH_VERBOSITY=10`) and attach the full output.
Cause: module, class, method, function, traceback, frame, or code object was expected, got cython_function_or_method
To silence this warning, decorate the function with @tf.autograph.experimental.do_not_convert
WARNING: AutoGraph could not transform <bound method Socket.send of <zmq.sugar.socket.Socket object at 0x7f5b279ce050>> and will run it as-is.
Please report this to the TensorFlow team. When filing the bug, set the verbosity to 10 (on Linux, `export AUTOGRAPH_VERBOSITY=10`) and attach the full output.
Cause: module, class, method, function, traceback, frame, or code object was expected, got cython_function_or_method
To silence this warning, decorate the function with @tf.autograph.experimental.do_not_convert
WARNING:tensorflow:The parameter `return_dict` cannot be set in graph mode and will always be set to `True`.
WARNING:tensorflow:From /home/sgugger/.pyenv/versions/3.7.9/envs/base/lib/python3.7/site-packages/tensorflow/python/ops/array_ops.py:5049: calling gather (from tensorflow.python.ops.array_ops) with validate_indices is deprecated and will be removed in a future version.
Instructions for updating:
The `validate_indices` argument has no effect. Indices are always validated on CPU and never validated on GPU.
WARNING:tensorflow:The parameters `output_attentions`, `output_hidden_states` and `use_cache` cannot be updated when calling a model.They have to be set to True/False in the config object (i.e.: `config=XConfig.from_pretrained('name', output_attentions=True)`).
WARNING:tensorflow:The parameter `return_dict` cannot be set in graph mode and will always be set to `True`.
459/459 [==============================] - ETA: 0s - loss: 0.6243WARNING:tensorflow:The parameters `output_attentions`, `output_hidden_states` and `use_cache` cannot be updated when calling a model.They have to be set to True/False in the config object (i.e.: `config=XConfig.from_pretrained('name', output_attentions=True)`).
WARNING:tensorflow:The parameter `return_dict` cannot be set in graph mode and will always be set to `True`.
459/459 [==============================] - 49s 81ms/step - loss: 0.6243 - val_loss: 0.5969
Epoch 2/3
459/459 [==============================] - 36s 79ms/step - loss: 0.5407 - val_loss: 0.5179
Epoch 3/3
459/459 [==============================] - 36s 79ms/step - loss: 0.3405 - val_loss: 0.5317

<tensorflow.python.keras.callbacks.History at 0x7f58507d3410>

preds = model.predict(tokenized_datasets['validation'])['logits']
probabilities = tf.nn.softmax(preds)
class_preds = np.argmax(probabilities, axis=1)

WARNING:tensorflow:The parameters `output_attentions`, `output_hidden_states` and `use_cache` cannot be updated when calling a model.They have to be set to True/False in the config object (i.e.: `config=XConfig.from_pretrained('name', output_attentions=True)`).
WARNING:tensorflow:The parameter `return_dict` cannot be set in graph mode and will always be set to `True`.

from datasets import load_metric

metric = load_metric("glue", "mrpc")
metric.compute(predictions=class_preds, references=raw_datasets['validation']['label'])

{'accuracy': 0.7549019607843137, 'f1': 0.8371335504885994}