installed_.net_frameworks

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# Filename: installed_.net_frameworks.py
# Version: 1.0.0
# Author: Jeoi Reqi

"""
This script retrieves version information about all installed .NET Framework versions on a Windows system.
"""

import winreg

def get_dotnet_frameworks():
    """
    Get installed .NET Framework versions.

    Returns:
        list: A list of installed .NET Framework versions.
    """
    dotnet_versions = []
    dotnet_release_keys = [
        (winreg.HKEY_LOCAL_MACHINE, r"SOFTWARE\Microsoft\NET Framework Setup\NDP"),
        (winreg.HKEY_LOCAL_MACHINE, r"SOFTWARE\Wow6432Node\Microsoft\NET Framework Setup\NDP")
    ]

    for hive, subkey in dotnet_release_keys:
        with winreg.OpenKey(hive, subkey, 0, winreg.KEY_READ) as key:
            subkey_names_count, _, _ = winreg.QueryInfoKey(key)
            for i in range(subkey_names_count):
                subkey_name = winreg.EnumKey(key, i)
                if subkey_name.startswith("v") and subkey_name not in dotnet_versions:
                    dotnet_versions.append(subkey_name)

    return dotnet_versions

def main():
    """
    Main function to retrieve installed .NET Framework versions and print them.
    """
    dotnet_versions = get_dotnet_frameworks()
    if dotnet_versions:
        print("Installed .NET Framework versions:")
        for version in dotnet_versions:
            print(f"- {version}")
    else:
        print("No .NET Frameworks found.")

if __name__ == "__main__":
    main()