The only way to get the schema "before consuming" is to not consume and instead interact with the registry directly
I use python confluent-kafka 1.5.0 with schema registry for consuming avro message from kafka.
I am only consumer, without access to admin producer or broker or something else.
I know topics name and from message fields i  get subject and namespace also in schema registry client, sr client get schema using schema_id from message.
According my goal i need method get schema(only id or subject name) BEFORE i start consuming. That is mean , i want to get schema by topic name manually
Please, read attentively, i know how get schema manually after i get schema_id from message.
How can I get schema before consuming?