app.py

import streamlit as st 
import zipfile, os, json
from io import StringIO



if 'data' not in st.session_state:
    st.session_state.data = 0

if 'download' not in st.session_state:
    st.session_state.download = False

if 'labels' not in st.session_state:
    st.session_state.labels = []

if 'images' not in st.session_state:
    st.session_state.images = []

c1, c2 = st.columns(2)

with c1:
    if st.button("Add new data"):
        st.session_state.data += 1

with c2:
    if st.button('Remove last data'):
        if st.session_state.data > 0 :
            st.session_state.data -= 1

def json_to_tokens(data):
    if isinstance(data, dict):
        result = ""
        for key, value in data.items():
            result += f"<{key}>"
            result += json_to_tokens(value)
            result += f"</{key}>"
        return result
    elif isinstance(data, list):
        result = ""
        for item in data:
            result += json_to_tokens(item)
            result += "<sep/>"
        result = result[:-6]
        return result
    else:
        return str(data)
        

with st.form("my_form"):
    col1, col2 = st.columns(2)
    
    for x in range(st.session_state.data):
        with col1:
            f = st.file_uploader("Upload Image",type=['png', 'jpg', 'jpeg'], key=f'image_{x}')
            # st.session_state.labels.append(f)
        with col2:
            txt = st.text_area("""Json Text""", key=f'label_{x}')
            # st.session_state.labels.append(txt)
            
    submitted = st.form_submit_button("Submit")

    if submitted:
        text = []
        images = []
        for x in range(st.session_state.data):
            k = json.loads(st.session_state[f'label_{x}'])
            text.append(k)
            images.append(st.session_state[f'image_{x}'])

        words = []
        for i,m in enumerate(text):
            words.append('<s_start>')
            words[i] += json_to_tokens(m)
            words[i] += '</s_start>'
        
        
        with zipfile.ZipFile('images.zip', 'w') as img_zip:
            for i,image in enumerate(images):
                img_name = f"{i}_image.jpg"
                img_zip.writestr(img_name, image.read())

        with zipfile.ZipFile("labels.zip", "w") as zip:
            for i,t in enumerate(words):
                txt_name = f"{i}_label.txt"
                zip.writestr(txt_name, t)
                
        st.session_state.download = True

if st.session_state.download:
    c_1, c_2 = st.columns(2)

    with c_1:
        with open("images.zip", "rb") as file:
            btn = st.download_button(
                    label="Download Images",
                    data=file,
                    file_name="images.zip")

    with c_2:
        with open("labels.zip", "rb") as file:
            btn = st.download_button(
                    label="Download Labels",
                    data=file,
                    file_name="labels.zip")