try pattern for database connection with the close method

[Mark Lawrence]

On 22/02/2015 18:41, Mario Figueiredo wrote:
> On Sat, 21 Feb 2015 12:22:58 +0000, Mark Lawrence
> <breamoreboy at yahoo.co.uk> wrote:
>
>>
>> Use your context manager at the outer level.
>>
>> import sqlite3 as lite
>>
>> try:
>>      with lite.connect('data.db') as db:
>>      try:
>>          db.execute(sql, parms)
>>      except lite.IntegrityError:
>>          raise ValueError('invalid data')
>> except lite.DatabaseError:
>>      raise OSError('database file corrupt or not found.')
>
> The sqlite context manager doesn't close a database connection on
> exit. It only ensures, commits and rollbacks are performed.
>

Where in the documentation does it state that?  If it does, it certainly 
breaks my expectations, as I understood the whole point of Python 
context managers is to do the tidying up for you.  Or have you misread 
what it says here 
https://docs.python.org/3/library/sqlite3.html#using-the-connection-as-a-context-manager 
?

 >>> import sqlite3
 >>> with 
sqlite3.connect(r'C:\Users\Mark\Documents\Cash\Data\cash.sqlite') as db:
...     db.execute('select count(*) from accounts')
...
<sqlite3.Cursor object at 0x00000000032C70A0>
 >>> db.close()
 >>>

Looks like you're correct.  Knock me down with a feather, Clevor Trevor.

-- 
My fellow Pythonistas, ask not what our language can do for you, ask
what you can do for our language.

Mark Lawrence