SQLite Class wrapper with auto-initialisation of empty DB

SQLiteDb class wrapping the operations from the sqlite3 module, providing better support for the with operator and automatic initialisation of an empty DB upon first creation of the DB.

Additional wrappers are available as a utility, including extraction of a list of tables, extraction of the list of columns of a SELECT query, commit, rollback, start of a transaction, check if the DB is in memory and if it's empty. Executions of SQL script files is also made easy.

Example usage

import sqlitecls

with sqlitecls.SqliteDb('mydata.db', 'myinitscript.sql') as db:
    # Now the DB connection is established and the DB is guaranteed
    # to be initialised, as if it the DB file was not existing before,
    # the init script is run, preparing it for whatever your
    # application has to do.
    #
    # You can easily check which tables are available
    tables = db.tables_names()
    # and what columns they have
    columns = db.columns_names('some_table')
    # Otherwise use as any other DB API from now on
    cursor = db.execute('SELECT * FROM mytable')
    # Simplified extraction of the column names from the SELECT query
    columns = sqlitecls.cursor_column_names(cursor)
    # Use as any other DB API from now on
    for row in cursor:
        pass  # Do something with each row
    db.connection, db.cursor  # Available for custom operations
    # More wrappers!
    db.start_transaction()
    db.commit()
    db.rollback()
    db.vacuum()
    # Have existing SQL script files? Just run them as they are!
    db.execute_sql_file('myotherfile.sql')  # Load WHOLE file in memory
# Connection automatically closed now