@harsha, your example is not a schema Snowplow can work with. First, you might need to familiarize yourself with self-describing JSON schema. You can read more about it here.
Once you composed the JSON schema to validate your Python event, you can upload it to Mini either via UI (Iglu Server tab - see wiki) or with Igluctl. The Igluctl command could look (depending on the version of your Snowplow Mini) like this
igluctl static push path/to-schema/ http://<Mini-domain-or-IP>/iglu-server <API key> --public