Code Editor for app.py

import streamlit as st
import re

st.title("IPv4 Address Extractor")

uploaded_file = st.file_uploader("Choose a text file", type=['txt'])

if uploaded_file is not None:
    if st.button("Process File"):
        # Read the contents of the file
        content = uploaded_file.getvalue().decode("utf-8")
        
        # Regular expression pattern for IPv4 addresses
        ipv4_pattern = r'\b(?:\d{1,3}\.){3}\d{1,3}\b'
        
        # Find all IPv4 addresses
        ip_addresses = re.findall(ipv4_pattern, content)
        
        # Filter valid IP addresses (additional validation)
        valid_ips = []
        for ip in ip_addresses:
            octets = ip.split('.')
            valid = True
            for octet in octets:
                if not (0 <= int(octet) <= 255):
                    valid = False
                    break
            if valid:
                valid_ips.append(ip)
        
        if valid_ips:
            st.write("Found IPv4 addresses:")
            for ip in valid_ips:
                st.write(f"- {ip}")
        else:
            st.write("No valid IPv4 addresses found in the file.")