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Inference Run with Galileo: A Quick guide

Text Classification Inference
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🏅
Enterprise-Only] Running Inference is only available for Enterprise users for now.
Stay tuned for future announcements.

Example Colab Notebooks

After building and training a model, inference allows us to run that model on unseen data, such as deploying that model in production. In text classification, given an unseen set of documents, the task is to predict (as correctly as possible) the class of that document based on the data seen during training.
input = "Perfectly works fine after 10 years, would highly recommend. Great buy!!"
# Unknown output label
model.predict(input) --> "positive review"

Logging the Data Inputs

Log your inference dataset. Galileo will join these samples with the model's outputs and present them in the Console. Note that unlike training, where ground truth labels are present for validation, during inference we assume that no ground truth labels exist.
PyTorch
import torch
import dataquality
import pandas as pd
from transformers import AutoTokenizer
class InferenceTextDataset(torch.utils.data.Dataset):
def __init__(
self, dataset: pd.DataFrame, inference_name: str
):
self.dataset = dataset
# 🔭🌕 Galileo logging
# Note 1: this works seamlessly because self.dataset has text, label, and
# id columns. See `help(dq.log_dataset)` for more info
# Note 2: We can set the inference_name for our run
dq.log_dataset(self.dataset, split="inference", inference_name=inference_name)
tokenizer = AutoTokenizer.from_pretrained("distilbert-base-uncased")
self.encodings = tokenizer(
self.dataset["text"].tolist(), truncation=True, padding=True
)
def __getitem__(self, idx):
x = torch.tensor(self.encodings["input_ids"][idx])
attention_mask = torch.tensor(self.encodings["attention_mask"][idx])
return self.dataset["id"][idx], x, attention_mask
def __len__(self):
return len(self.dataset)

Logging the Inference Model Outputs

Log model outputs from within your model's forward function.
PyTorch
import torch
import torch.nn.functional as F
from torch.nn import Linear
from transformers import AutoModel
class TextClassificationModel(torch.nn.Module):
"""Defines a Pytorch text classification bert based model."""
def __init__(self, num_labels: int):
super().__init__()
self.feature_extractor = AutoModel.from_pretrained("distilbert-base-uncased")
self.classifier = Linear(self.feature_extractor.config.hidden_size, num_labels)
def forward(self, x, attention_mask, ids):
"""Model forward function."""
encoded_layers = self.feature_extractor(
input_ids=x, attention_mask=attention_mask
).last_hidden_state
classification_embedding = encoded_layers[:, 0]
logits = self.classifier(classification_embedding)
# 🔭🌕 Galileo logging
dq.log_model_outputs(
embs=classification_embedding, logits=logits, ids=ids
)
return logits

Putting it all together

Login and initialize a new project + run name or one matching an existing training run (this will add inference to that training run in the console). Then, load and log your inference dataset; load a pre-trained model; set the split to inference and run your inference run; finally call dq.finish()!
Note: if you're extending a current training run, the list_of_labels logged for your dataset must match exactly that used during training.
PyTorch
import numpy as np
import io
import random
from smart_open import open as smart_open
import s3fs
import torch
import torch.nn.functional as F
import torchmetrics
from tqdm.notebook import tqdm
BATCH_SIZE = 32
# 🔭🌕 Galileo logging - initialize project/run name
dq.login()
dq.init(task_type="text_classification", project_name=project_name, run_name=run_name)
device = torch.device("cuda") if torch.cuda.is_available() else torch.device("cpu"))
inference_dataset = InferenceTextDataset(inference_df, inference_name="inference_run_1")
# 🔭🌕 Galileo logging
# Note: if you are adding the inference run to a previous
# training run, the labels and there order must match that used
# in training. If you're logging inference in isolation then
# this order does not matter.
list_of_labels = ["labels", "ordered", "from", "trianing"]
dq.set_labels_for_run(list_of_labels)
inference_dataloader = torch.utils.data.DataLoader(
inference_dataset,
batch_size=BATCH_SIZE,
shuffle=False
)
# Load your pre-trained model
model_path = "path/to/your/model.pt"
model = TextClassificationModel(num_labels=len(list_of_labels))
model.load_state_dict(torch.load(model_path))
model.to(device)
model.eval()
# 🔭🌕 Galileo logging - naming your inference run
inference_name = "inference_run_1"
dq.set_split("inference", inference_name)
for data in tqdm(inference_dataloader):
x_idxs, x, attention_mask = data
x = x.to(device)
attention_mask = attention_mask.to(device)
model(x, attention_mask, x_idxs)
print("Finished Inference")
# 🔭🌕 Galileo logging
dq.finish()
print("Finished uploading")