Python winreg 模块，HKEY_CLASSES_ROOT 实例源码

def remove_jupyter_here():
    for env in ('qtconsole', 'notebook'):
        try:
            winreg.DeleteKey(
                winreg.HKEY_CLASSES_ROOT,
                r'Directory\shell\jupyter_%s_here\Command' %
                env)
            winreg.DeleteKey(
                winreg.HKEY_CLASSES_ROOT,
                r'Directory\shell\jupyter_%s_here' %
                env)
            winreg.DeleteKey(
                winreg.HKEY_CLASSES_ROOT,
                r'Directory\Background\shell\jupyter_%s_here\Command' %
                env)
            winreg.DeleteKey(
                winreg.HKEY_CLASSES_ROOT,
                r'Directory\Background\shell\jupyter_%s_here' %
                env)
            print("Jupyter %s here context menu entry removed." % env)
        except:
            # If this fails it is because it was not installed, so nothing to
            # worry about.
            pass

def RegisterPythonServer(filename, progids=None, verbose=0):
    if progids:
        if isinstance(progids, str):
            progids = [progids]
        # we know the CLSIDs we need, but we might not be an admin user
        # and otherwise unable to register them.  So as long as the progids
        # exist and the DLL points at our version, assume it already is.
        why_not = None
        for progid in progids:
            try:
                clsid = pythoncom.MakeIID(progid)
            except pythoncom.com_error:
                # no progid - not registered.
                break
            # have a CLSID - open it.
            try:
                HKCR = winreg.HKEY_CLASSES_ROOT
                hk = winreg.OpenKey(HKCR, "CLSID\\%s" % clsid)
                dll = winreg.QueryValue(hk, "InprocServer32")
            except WindowsError:
                # no CLSID or InProcServer32 - not good!
                break
            ok_files = [os.path.basename(pythoncom.__file__),
                        'pythoncomloader%d%d.dll' % (sys.version_info[0], sys.version_info[1])]
            if os.path.basename(dll) not in ok_files:
                why_not = "%r is registered against a different Python version (%s)" % (progid, dll)
                break
        else:
            #print "Skipping registration of '%s' - already registered" % filename
            return
    # needs registration - see if its likely!
    try:
        from win32com.shell.shell import IsUserAnAdmin
    except ImportError:
        print("Can't import win32com.shell - no idea if you are an admin or not?")
        is_admin = False
    else:
        try:
            is_admin = IsUserAnAdmin()
        except pythoncom.com_error:
            # old, less-secure OS - assume *is* admin.
            is_admin = True
    if not is_admin:
        msg = "%r isn't registered, but I'm not an administrator who can register it." % progids[0]
        if why_not:
            msg += "\n(registration check failed as %s)" % why_not
        # throw a normal "class not registered" exception - we don't report
        # them the same way as "real" errors.
        raise pythoncom.com_error(winerror.CO_E_CLASSSTRING, msg, None, -1)
    # so theoretically we are able to register it.
    cmd = '%s "%s" --unattended > nul 2>&1' % (win32api.GetModuleFileName(0), filename)
    if verbose:
        print("Registering engine", filename)
#       print cmd
    rc = os.system(cmd)
    if rc:
        print("Registration command was:")
        print(cmd)
        raise RuntimeError("Registration of engine '%s' failed" % filename)