screen_keys = ['avail_top',
                   'orientation', 'pixel_depth', 'avail_height', 'width']

header_keys = ['device', 'mainStorage', 'display',
               'features']

cols_last_content = ['is_tablet', 'app_version', 'vendor', 'os_family', 'device_brand',
                         'product_sub', 'app_name', 'do_not_track', 'width', 'browser_family', 'device_model',
                         'on_line',
                         'orientation', 'device_family', 'cookie_enabled', 'is_pc', 'os_version', 'is_touch_capable',
                         'browser_version', 'avail_height', 'max_touch_points', 'pixel_depth', 'avail_top',
                         'is_android_tablet', 'hardware_concurrency', 'platform', 'language', 'is_mobile'
                         ]

features_dict = {'screen': screen_keys,
                     'browser': browser_keys}

true_false_mapping = {'true': 1, 'false': 0}