autotweet.database — Database structure

This module provides methods to get session, get answer, etc.

exception autotweet.database.NoAnswerError(msg)

Raises when autotweet can not found best answer to a question.

Parameters:msg (str) – A message for the exception

autotweet.database.get_count(session)

Get count of Document.

Parameters:session (sqlalchemt.orm.Session) – DB session

autotweet.database.get_session(url)

Get db session.

Parameters:url (str) – URL for connect with DB Returns:A sqlalchemy db session Return type:sqlalchemy.orm.Session

autotweet.database.add_document(session, question, answer)

Add question answer set to DB.

Parameters:

• session (sqlalchemt.orm.Session) – DB session
• question (str) – A question to an answer
• answer (str) – An answer to a question

autotweet.database.get_best_answer(session, query)

Get best answer to a question.

Parameters:

• session (sqlalchemt.orm.Session) – DB session
• query (str) – A question to get an answer

Returns:

An answer to a question

Return type:

str

Raises:

NoAnswerError when can not found answer to a question

autotweet.database.recreate_grams(session)

Re-create grams for database.

In normal situations, you never need to call this method. But after migrate DB, this method is useful.

Parameters:session (sqlalchemt.orm.Session) – DB session

autotweet.database.recalc_idfs(session, grams=None)

Re-calculate idfs for database.

calculating idfs for gram is taking long time. So I made it calculates idfs for some grams. If you want make accuracy higher, use this with grams=None.

Parameters:

• session (sqlalchemt.orm.Session) – DB session
• grams (A set of Gram) – grams that you want to re-calculating idfs