app.py

import streamlit as st
from PIL import Image
import io
import base64

def main():
    st.title('Image Resizer')

    uploaded_file = st.file_uploader("Upload an image", type=["jpg", "jpeg", "png"])

    if uploaded_file is not None:
        try:
            img = Image.open(uploaded_file)

            width = st.number_input('Enter the width:', min_value=1)
            height = st.number_input('Enter the height:', min_value=1)

            if st.button('Resize'):
                resized_img = img.resize((int(width), int(height)))

                output = io.BytesIO()
                resized_img.save(output, format='JPEG')  # Change format if desired (JPEG, PNG, etc.)
                st.markdown(get_binary_file_downloader_html(output, 'resized_image.jpg', 'Download Resized Image'), unsafe_allow_html=True)

        except Exception as e:
            st.error(f"An error occurred: {str(e)}")

def get_binary_file_downloader_html(bin_file, file_label='File', button_text='Download'):
    # Helper function to create download link
    bin_str = bin_file.getvalue()
    bin_file.close()
    href = f'data:application/octet-stream;base64,{base64.b64encode(bin_str).decode()}'
    return f'<a href="{href}" download="{file_label}">{button_text}</a>'

if __name__ == '__main__':
    main()