how to list all programs installed on windows using python

1import winreg
2
3def foo(hive, flag):
4    aReg = winreg.ConnectRegistry(None, hive)
5    aKey = winreg.OpenKey(aReg, r"SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall",
6                          0, winreg.KEY_READ | flag)
7
8    count_subkey = winreg.QueryInfoKey(aKey)[0]
9
10    software_list = []
11
12    for i in range(count_subkey):
13        software = {}
14        try:
15            asubkey_name = winreg.EnumKey(aKey, i)
16            asubkey = winreg.OpenKey(aKey, asubkey_name)
17            software['name'] = winreg.QueryValueEx(asubkey, "DisplayName")[0]
18
19            try:
20                software['version'] = winreg.QueryValueEx(asubkey, "DisplayVersion")[0]
21            except EnvironmentError:
22                software['version'] = 'undefined'
23            try:
24                software['publisher'] = winreg.QueryValueEx(asubkey, "Publisher")[0]
25            except EnvironmentError:
26                software['publisher'] = 'undefined'
27            software_list.append(software)
28        except EnvironmentError:
29            continue
30
31    return software_list
32
33software_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)
34
35for software in software_list:
36    print('Name=%s, Version=%s, Publisher=%s' % (software['name'], software['version'], software['publisher']))
37print('Number of installed apps: %s' % len(software_list))