python for mysql pratice

------When a connection or operational request is received by connections.Connection(),
it is processed and passed to _mysql and subsequently to the MySQL API in C
to perform it.
To handle this interface, _mysql uses two classes:
connectionresult
The frst is used to establish communication with MySQL and thus returns a
connection object. The second, as the name implies, returns a set containing the
results from a MySQL command that a program sends. These results can be either
the query results or an error. _mysql naturally passes the error to the calling process.
In the case of MySQLdb, we then have a comprehensive toolbox to handle the errors
that may arise.