Generate a list of all installed programs on MS Win 10, exclude MS programs, write to file

program_list.py

import datetime
import winreg

# Script from here: https://gist.github.com/psatler/010b26cd57e758278823d7027c40e2a6
# Slightly modified

dt = datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")


def foo(hive, flag):
    aReg = winreg.ConnectRegistry(None, hive)
    aKey = winreg.OpenKey(
        aReg,
        r"SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall",
        0,
        winreg.KEY_READ | flag,
    )

    count_subkey = winreg.QueryInfoKey(aKey)[0]

    software_list = []

    for i in range(count_subkey):
        software = {}
        try:
            asubkey_name = winreg.EnumKey(aKey, i)
            asubkey = winreg.OpenKey(aKey, asubkey_name)
            software["name"] = winreg.QueryValueEx(asubkey, "DisplayName")[0]

            try:
                software["version"] = winreg.QueryValueEx(asubkey, "DisplayVersion")[0]
            except EnvironmentError:
                software["version"] = "undefined"
            try:
                software["publisher"] = winreg.QueryValueEx(asubkey, "Publisher")[0]
            except EnvironmentError:
                software["publisher"] = "undefined"
            software_list.append(software)
        except EnvironmentError:
            continue

    return software_list


software_list = (
    foo(winreg.HKEY_LOCAL_MACHINE, winreg.KEY_WOW64_32KEY)
    + foo(winreg.HKEY_LOCAL_MACHINE, winreg.KEY_WOW64_64KEY)
    + foo(winreg.HKEY_CURRENT_USER, 0)
)

software_list = [sw for sw in software_list if "Microsoft" not in sw["publisher"]]

max_lens = [0, 0]
for sw in software_list:
    if len(sw["name"]) > max_lens[0]:
        max_lens[0] = len(sw["name"])
    if len(sw["version"]) > max_lens[1]:
        max_lens[1] = len(sw["version"])

software_list = sorted(software_list, key=lambda d: (d["name"], d["publisher"]))

with open("C:/temp/programlist.txt", "w") as f:
    f.write(f"Number of installed apps: {len(software_list)} | {dt}\n")
    print(f"Number of installed apps: {len(software_list)} | {dt}")
    f.write(f"{'=' * 200}\n")
    print("=" * 200)
    for software in software_list:
        f.write(
            f"{software['name']:<{max_lens[0]}} | {software['version']:<{max_lens[1]}} | {software['publisher']}\n"
        )
        print(
            f"{software['name']:<{max_lens[0]}} | {software['version']:<{max_lens[1]}} | {software['publisher']}"
        )