('_session_referrer_domain', <class 'str'>)
('$ip', <class 'str'>)
('$is_first_time', <class 'bool'>)
('$latest_referrer_host', <class 'str'>)
('$screen_width', <class 'int'>)
('$first_visit_time', <class 'str'>)
('$latest_utm_content', <class 'str'>)
('info', <class 'str'>)
('contact', <class 'str'>)
('$first_referrer', <class 'str'>)
('$utm_content', <class 'str'>)
('$referrer_host', <class 'str'>)
('result', <class 'str'>)
('$os_version', <class 'str'>)
('$latest_utm_medium', <class 'str'>)
('$latest_utm_term', <class 'str'>)
('_latest_ch', <class 'str'>)
('url_path', <class 'str'>)
('isSuccess', <class 'bool'>)
('$model', <class 'str'>)
('pageStayTime', <class 'float'>)
('$utm_term', <class 'str'>)
('site_url', <class 'str'>)
('isMsg', <class 'bool'>)
('referrerUrl', <class 'str'>)
('$first_browser_language', <class 'str'>)
('$browser', <class 'str'>)
('requestBtn', <class 'str'>)
('$latest_utm_campaign', <class 'str'>)
('$utm_source', <class 'str'>)
('pageUrl', <class 'str'>)
('pagePosition', <class 'int'>)
('$url', <class 'str'>)
('$latest_referrer', <class 'str'>)
('company', <class 'str'>)
('$os', <class 'str'>)
('_session_from_url', <class 'str'>)
('$referrer', <class 'str'>)
('name', <class 'str'>)
('$first_referrer_host', <class 'str'>)
('page', <class 'str'>)
('$lib_version', <class 'str'>)
('verification_code', <class 'str'>)
('$screen_height', <class 'int'>)
('_session_referrer', <class 'str'>)
('email', <class 'str'>)
('from_url', <class 'str'>)
('$url_path', <class 'str'>)
('ch', <class 'str'>)
('pageStayTime', <class 'int'>)
('project_name', <class 'str'>)
('$utm_campaign', <class 'str'>)
('$lib', <class 'str'>)
('$utm_medium', <class 'str'>)
('_session_referrer_host', <class 'str'>)
('$latest_utm_source', <class 'str'>)
('siteUrl', <class 'str'>)
('$is_first_day', <class 'bool'>)
('referrHostUrl', <class 'str'>)
('$browser_version', <class 'str'>)
('session_page_url', <class 'str'>)
('$title', <class 'str'>)
There are 61 sub features in properties.