app.py

import torch
import numpy as np
import gradio as gr
import matplotlib.pyplot as plt
from model import Generator

# Load the model
device = torch.device("cpu")
generator = Generator()
generator.load_state_dict(torch.load("generator_digit.pth", map_location=device))
generator.eval()

def generate_images(digit):
    noise = torch.randn(5, 100)
    labels = torch.tensor([digit] * 5)
    with torch.no_grad():
        images = generator(noise, labels).squeeze().numpy()

    # Plot the 5 images in one figure
    fig, axs = plt.subplots(1, 5, figsize=(10, 2))
    for i in range(5):
        axs[i].imshow(images[i], cmap='gray')
        axs[i].axis('off')
    return fig

# Gradio Interface using modern syntax
demo = gr.Interface(
    fn=generate_images,
    inputs=gr.Slider(0, 9, step=1, label="Digit (0–9)"),
    outputs=gr.Plot(label="Generated Images"),
    title="MNIST Digit Generator",
    description="Generates 5 handwritten images of the selected digit using a trained GAN."
)

demo.launch()