app.py

# 1. Import the required packages
import torch
import gradio as gr

from typing import Dict
from transformers import pipeline

# 2. Define function to use our model on given text
def food_not_food_classifier(text: str) -> Dict[str, float]:
    # Set up text classification pipeline
    food_not_food_classifier = pipeline(task="text-classification",
                                        # Because our model is on Hugging Face already, we can pass in the model name directly
                                        model="shlomoc/learn_hf_food_not_food_text_classifier-distilbert-base-uncased", # link to model on HF Hub
                                        device="cuda" if torch.cuda.is_available() else "cpu",
                                        top_k=None) # return all possible scores (not just top-1)

    # Get outputs from pipeline (as a list of dicts)
    outputs = food_not_food_classifier(text)[0]

    # Format output for Gradio (e.g. {"label_1": probability_1, "label_2": probability_2})
    output_dict = {}
    for item in outputs:
        output_dict[item["label"]] = item["score"]

    return output_dict

# 3. Create a Gradio interface with details about our app
description = """
A text classifier to determine if the text is about food or not food.
The original dataset is extended with 20 rows of short phrases for "food" (like "apple"), and "not food" (like "computer")

Fine-tuned from [DistilBERT](https://huggingface.co/distilbert/distilbert-base-uncased) on a [small dataset of food and not food text](https://huggingface.co/datasets/shlomoc/learn_hf_food_not_food_image_captions).

See [source code](https://github.com/mrdbourke/learn-huggingface/blob/main/notebooks/hugging_face_text_classification_tutorial.ipynb).
"""

demo = gr.Interface(fn=food_not_food_classifier,
             inputs="text",
             outputs=gr.Label(num_top_classes=2), # show top 2 classes (that's all we have)
             title="🍗🚫🥑 Food or Not Food Text Classifier",
             description=description,
             examples=[["I whipped up a fresh batch of code, but it seems to have a syntax error."],
                       ["A delicious photo of a plate of scrambled eggs, bacon and toast."],
                       ["apple"]])

# 4. Launch the interface
if __name__ == "__main__":
    demo.launch()