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copied!<p>What about x86 on x64? <a href="http://docs.python.org/2/library/_winreg.html#bit-specific" rel="noreferrer">Use <em>64-bit Specific</em> Types</a></p> <p>What if there's more than 1024 sub-keys in "Uninstall"? <a href="http://docs.python.org/2/library/_winreg.html#_winreg.QueryInfoKey" rel="noreferrer">Use <em>_winreg.QueryInfoKey(key)</em></a></p> <p><strong>Python 2:</strong></p> <pre><code>import errno, os, _winreg proc_arch = os.environ['PROCESSOR_ARCHITECTURE'].lower() proc_arch64 = os.environ['PROCESSOR_ARCHITEW6432'].lower() if proc_arch == 'x86' and not proc_arch64: arch_keys = {0} elif proc_arch == 'x86' or proc_arch == 'amd64': arch_keys = {_winreg.KEY_WOW64_32KEY, _winreg.KEY_WOW64_64KEY} else: raise Exception("Unhandled arch: %s" % proc_arch) for arch_key in arch_keys: key = _winreg.OpenKey(_winreg.HKEY_LOCAL_MACHINE, r"SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall", 0, _winreg.KEY_READ | arch_key) for i in xrange(0, _winreg.QueryInfoKey(key)[0]): skey_name = _winreg.EnumKey(key, i) skey = _winreg.OpenKey(key, skey_name) try: print _winreg.QueryValueEx(skey, 'DisplayName')[0] except OSError as e: if e.errno == errno.ENOENT: # DisplayName doesn't exist in this skey pass finally: skey.Close() </code></pre> <p><strong>Python 3:</strong></p> <pre><code>import errno, os, winreg proc_arch = os.environ['PROCESSOR_ARCHITECTURE'].lower() proc_arch64 = os.environ['PROCESSOR_ARCHITEW6432'].lower() if proc_arch == 'x86' and not proc_arch64: arch_keys = {0} elif proc_arch == 'x86' or proc_arch == 'amd64': arch_keys = {winreg.KEY_WOW64_32KEY, winreg.KEY_WOW64_64KEY} else: raise Exception("Unhandled arch: %s" % proc_arch) for arch_key in arch_keys: key = winreg.OpenKey(winreg.HKEY_LOCAL_MACHINE, r"SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall", 0, winreg.KEY_READ | arch_key) for i in range(0, winreg.QueryInfoKey(key)[0]): skey_name = winreg.EnumKey(key, i) skey = winreg.OpenKey(key, skey_name) try: print(winreg.QueryValueEx(skey, 'DisplayName')[0]) except OSError as e: if e.errno == errno.ENOENT: # DisplayName doesn't exist in this skey pass finally: skey.Close() </code></pre>

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