def register(target, current=True):
    root = winreg.HKEY_CURRENT_USER if current else winreg.HKEY_LOCAL_MACHINE

    # Extensions
    winreg.SetValueEx(winreg.CreateKey(root, KEY_C % ".py"),
                      "", 0, winreg.REG_SZ, "Python.File")
    winreg.SetValueEx(winreg.CreateKey(root, KEY_C % ".pyw"),
                      "", 0, winreg.REG_SZ, "Python.NoConFile")
    winreg.SetValueEx(winreg.CreateKey(root, KEY_C % ".pyc"),
                      "", 0, winreg.REG_SZ, "Python.CompiledFile")
    winreg.SetValueEx(winreg.CreateKey(root, KEY_C % ".pyo"),
                      "", 0, winreg.REG_SZ, "Python.CompiledFile")

    # MIME types
    winreg.SetValueEx(winreg.CreateKey(root, KEY_C % ".py"),
                      "Content Type", 0, winreg.REG_SZ, "text/plain")
    winreg.SetValueEx(winreg.CreateKey(root, KEY_C % ".pyw"),
                      "Content Type", 0, winreg.REG_SZ, "text/plain")

    # Verbs
    python = osp.abspath(osp.join(target, 'python.exe'))
    pythonw = osp.abspath(osp.join(target, 'pythonw.exe'))
    spyder = osp.abspath(osp.join(target, os.pardir, 'Spyder.exe'))
    if not osp.isfile(spyder):
        spyder = '%s" "%s\Scripts\spyder' % (pythonw, target)
    winreg.SetValueEx(winreg.CreateKey(root, KEY_C2 % ("", "open")),
                      "", 0, winreg.REG_SZ, '"%s" "%%1" %%*' % python)
    winreg.SetValueEx(winreg.CreateKey(root, KEY_C2 % ("NoCon", "open")),
                      "", 0, winreg.REG_SZ, '"%s" "%%1" %%*' % pythonw)
    winreg.SetValueEx(winreg.CreateKey(root, KEY_C2 % ("Compiled", "open")),
                      "", 0, winreg.REG_SZ, '"%s" "%%1" %%*' % python)
    winreg.SetValueEx(winreg.CreateKey(root, KEY_C2 % ("", EWI)),
                      "", 0, winreg.REG_SZ,
                      '"%s" "%s\Lib\idlelib\idle.pyw" -n -e "%%1"'
                      % (pythonw, target))
    winreg.SetValueEx(winreg.CreateKey(root, KEY_C2 % ("NoCon", EWI)),
                      "", 0, winreg.REG_SZ,
                      '"%s" "%s\Lib\idlelib\idle.pyw" -n -e "%%1"'
                      % (pythonw, target))
    winreg.SetValueEx(winreg.CreateKey(root, KEY_C2 % ("", EWS)),
                      "", 0, winreg.REG_SZ, '"%s" "%%1"' % spyder)
    winreg.SetValueEx(winreg.CreateKey(root, KEY_C2 % ("NoCon", EWS)),
                      "", 0, winreg.REG_SZ, '"%s" "%%1"' % spyder)

    # Drop support
    handler = "{60254CA5-953B-11CF-8C96-00AA00B8708C}"
    for ftype in ("", "NoCon", "Compiled"):
        winreg.SetValueEx(winreg.CreateKey(root, KEY_DROP1 % ftype),
                          "", 0, winreg.REG_SZ, handler)

    # Icons
    dlls = osp.join(target, 'DLLs')
    winreg.SetValueEx(winreg.CreateKey(root, KEY_I % ""),
                      "", 0, winreg.REG_SZ, r'%s\py.ico' % dlls)
    winreg.SetValueEx(winreg.CreateKey(root, KEY_I % "NoCon"),
                      "", 0, winreg.REG_SZ, r'%s\py.ico' % dlls)
    winreg.SetValueEx(winreg.CreateKey(root, KEY_I % "Compiled"),
                      "", 0, winreg.REG_SZ, r'%s\pyc.ico' % dlls)

    # Descriptions
    winreg.SetValueEx(winreg.CreateKey(root, KEY_D % ""),
                      "", 0, winreg.REG_SZ, "Python File")
    winreg.SetValueEx(winreg.CreateKey(root, KEY_D % "NoCon"),
                      "", 0, winreg.REG_SZ, "Python File (no console)")
    winreg.SetValueEx(winreg.CreateKey(root, KEY_D % "Compiled"),
                      "", 0, winreg.REG_SZ, "Compiled Python File")

    # PythonCore entries
    short_version = utils.get_python_infos(target)[0]
    long_version = utils.get_python_long_version(target)
    key_core = (KEY_S1 % short_version) + r'\%s'
    winreg.SetValueEx(winreg.CreateKey(root, key_core % 'InstallPath'),
                      "", 0, winreg.REG_SZ, target)
    winreg.SetValueEx(winreg.CreateKey(root,
                                       key_core % r'InstallPath\InstallGroup'),
                      "", 0, winreg.REG_SZ, "Python %s" % short_version)
    winreg.SetValueEx(winreg.CreateKey(root, key_core % 'Modules'),
                      "", 0, winreg.REG_SZ, "")
    winreg.SetValueEx(winreg.CreateKey(root, key_core % 'PythonPath'),
                      "", 0, winreg.REG_SZ,
                      r"%s\Lib;%s\DLLs" % (target, target))
    winreg.SetValueEx(winreg.CreateKey(root,
                               key_core % r'Help\Main Python Documentation'),
                      "", 0, winreg.REG_SZ,
                      r"%s\Doc\python%s.chm" % (target, long_version))

    # Create start menu entries for all WinPython launchers
    for path, desc, fname in _get_shortcut_data(target, current=current):
        utils.create_shortcut(path, desc, fname)

    # Register the Python ActiveX Scripting client (requires pywin32)
    axscript = osp.join(target, 'Lib', 'site-packages', 'win32comext',
                        'axscript', 'client', 'pyscript.py')
    if osp.isfile(axscript):
        subprocess.call('"%s" "%s"' % (python, axscript), cwd=target)
    else:
        print('Unable to register ActiveX: please install pywin32',
              file=sys.stderr)
Register a Python distribution in Windows registry
dataset/ETHPy150Open winpython/winpython/winpython/associate.py/register