def transformEvent(event, metadata):
    lower_user_agent = event["context"]["userAgent"]
    known_bot_filter_list = ['bot', 'crawler', 'spider', 'feedfetcher-google', 'mediapartners-google', 'apis-google', 'slurp', 'python-urllib', 'python-requests', 'aiohttp', 'httpx', 'libwww-perl', 'httpunit', 'nutch', 'go-http-client', 'biglotron', 'teoma', 'convera', 'gigablast', 'ia_archiver', 'webmon ', 'httrack', 'grub.org', 'netresearchserver', 'speedy', 'fluffy', 'findlink', 'panscient', 'ips-agent', 'yanga', 'yandex', 'yadirectfetcher', 'cyberpatrol', 'postrank', 'page2rss', 'linkdex', 'ezooms', 'heritrix', 'findthatfile', 'europarchive.org', 'mappydata', 'eright', 'apercite', 'aboundex', 'summify', 'ec2linkfinder', 'facebookexternalhit', 'yeti', 'retrevopageanalyzer', 'sogou', 'wotbox', 'ichiro', 'drupact', 'coccoc', 'integromedb', 'siteexplorer.info', 'proximic', 'changedetection', 'cc metadata scaper', 'g00g1e.net', 'binlar', 'a6-indexer', 'admantx', 'megaindex', 'ltx71', 'bubing', 'qwantify', 'lipperhey', 'addthis', 'metauri', 'scrapy', 'capsulechecker', 'sonic', 'sysomos', 'trove', 'deadlinkchecker', 'slack-imgproxy', 'embedly', 'iskanie', 'skypeuripreview', 'google-adwords-instant', 'whatsapp', 'electricmonk', 'yahoo link preview', 'xenu link sleuth', 'pcore-http', 'appinsights', 'phantomjs', 'jetslide', 'newsharecounts', 'tineye', 'linkarchiver', 'digg deeper', 'snacktory', 'okhttp', 'nuzzel', 'omgili', 'pocketparser', 'um-ln', 'muckrack', 'netcraftsurveyagent', 'appengine-google', 'jetty', 'upflow', 'thinklab', 'traackr.com', 'twurly', 'mastodon', 'http_get', 'brandverity', 'check_http', 'ezid', 'genieo', 'meltwaternews', 'moreover', 'scoutjet', 'seoscanners', 'hatena', 'google web preview', 'adscanner', 'netvibes', 'baidu-yunguance', 'btwebclient', 'disqus', 'feedly', 'fever', 'flamingo_searchengine', 'flipboardproxy', 'g2 web services', 'vkshare', 'siteimprove.com', 'dareboost', 'feedspot', 'seokicks', 'tracemyfile', 'zgrab', 'pr-cy.ru', 'datafeedwatch', 'zabbix', 'google-xrawler', 'axios', 'amazon cloudfront', 'pulsepoint', 'cloudflare-alwaysonline', 'google-structured-data-testing-tool', 'wordupinfosearch', 'webdatastats', 'httpurlconnection', 'outbrain', 'w3c_validator', 'w3c-checklink', 'w3c-mobileok', 'w3c_i18n-checker', 'feedvalidator', 'w3c_css_validator', 'w3c_unicorn', 'google-physicalweb', 'blackboard', 'bazqux', 'twingly', 'rivva', 'dataprovider.com', 'theoldreader.com', 'anyevent', 'nmap scripting engine', '2ip.ru', 'clickagy', 'google favicon', 'hubspot', 'chrome-lighthouse', 'headlesschrome', 'simplescraper', 'fedoraplanet', 'friendica', 'nextcloud', 'tiny tiny rss', 'datanyze', 'google-site-verification', 'trendsmapresolver', 'tweetedtimes', 'gwene', 'simplepie', 'searchatlas', 'superfeedr', 'freewebmonitoring sitechecker', 'pandalytics', 'seewithkids', 'cincraw', 'freshrss', 'google-certificates-bridge', 'viber', 'evc-batch', 'virustotal', 'uptime-kuma', 'feedbin', 'snap url preview service', 'ruxitsynthetic', 'google-read-aloud', 'mediapartners', 'wget', 'wget', 'ahrefsgot', 'ahrefssiteaudit', 'wesee:search', 'y!j', 'collection@infegy.com', 'deusu', 'bingpreview', 'daum', 'pingdom', 'barkrowler', 'yak', 'ning', 'ahc', 'apache-httpclient', 'buck', 'newspaper', 'sentry', 'fetch', 'miniflux', 'validator.nu', 'grouphigh', 'checkmarknetwork', 'www.uptime.com', 'mixnodecache', 'domains project', 'pagepeeker', 'vigil', 'php-curl-class', 'ptst', 'seostar.co']
    if any([bot_name in lower_user_agent for bot_name in known_bot_filter_list]):
        return
    else:
        return event

[
  {
    "anonymousId": "8d872292709c6fbe",
    "channel": "mobile",
    "context": {
      "app": {
        "build": "1",
        "name": "AMTestProject",
        "namespace": "com.rudderstack.android.rudderstack.sampleAndroidApp",
        "version": "1.0"
      },
      "device": {
        "id": "8d872292709c6fbe",
        "manufacturer": "Google",
        "model": "AOSPonIAEmulator",
        "name": "generic_x86_arm",
        "type": "android"
      },
      "library": {
        "name": "com.rudderstack.android.sdk.core",
        "version": "1.0.2"
      },
      "locale": "en-US",
      "network": {
        "carrier": "Android",
        "bluetooth": false,
        "cellular": true,
        "wifi": true
      },
      "os": {
        "name": "Android",
        "version": "9"
      },
      "screen": {
        "density": 420,
        "height": 1794,
        "width": 1080
      },
      "timezone": "Asia/Kolkata",
      "traits": {
        "address": {
          "city": "Kolkata",
          "country": "India",
          "postalcode": "700096",
          "state": "West bengal",
          "street": "Park Street"
        },
        "age": "30",
        "anonymousId": "8d872292709c6fbe",
        "birthday": "2020-05-26",
        "createdat": "18th March 2020",
        "description": "Premium User for 3 years",
        "email": "identify@test.com",
        "firstname": "John",
        "userId": "sample_user_id",
        "lastname": "Sparrow",
        "name": "John Sparrow",
        "id": "sample_user_id",
        "phone": "9112340345",
        "username": "john_sparrow"
      },
      "userAgent": "Mozilla/5.0 (compatible; YandexBot/3.0; +http://yandex.com/bots) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.268 [ip:5.45.207.144]"
    },
    "event": "Product Clicked",
    "integrations": {
      "All": true
    },
    "messageId": "1590431830915-73bed370-5889-436d-9a9e-0c0e0c809d06",
    "properties": {
      "revenue": "30",
      "currency": "USD",
      "quantity": "5",
      "test_key_2": {
        "test_child_key_1": "test_child_value_1"
      },
      "price": "58.0"
    },
    "originalTimestamp": "2020-05-25T18:37:10.917Z",
    "type": "track",
    "userId": "sample_user_id"
  }
]