Flask supports database-powered applications (RDBS). Such a system requires creating a schema, which requires piping the shema.sql file into a sqlite3 command. So you need to install sqlite3 command in order to create or initiate the database in Flask.
Flask allows to request database in three ways
- before_request(): It is called before a request and pass no arguments
- after_request(): It is called after a request and pass the response that will be sent to the client
- teardown_request(): It is called in a situation when exception is raised, and response is not guaranteed. They are called after the response has been constructed. They are not allowed to modify the request, and their values are ignored.
anand.johari1994