[Tutor] The case of the missing close

[Hugo González Monteverde]

Hi Andrew,

The error you're getting has nothing to do aith a connection, it simply 
reports that the  db_utils module does not have a close method. I'm 
thinking perhaps what you want to do is

cursobj.close()

As you instantiated a connection before, you should call that instance's 
  "close" method. Please let me know if maybe I'm misunderstanding it...

Hugo

Robert, Andrew wrote:
> Hi everyone,
> 
> I am trying to create a generic db_utils.py module that I will then
> generically import into programs as needed.
> 
> The first function I am trying to implement iis to generically open an
> Oracle database connection based on passed database/authentication
> parameters.
> 
> So far, I have been able to:
> 
> - import the custom module db_utils
> - pass the parameters function dbopen in the custom module
> - open the connection to the requested database
> - pass back the cursor object to the calling program for later
> processing.
> 
> The problem is in closing the connection.
> 
> No matter what I try,  I receive an error stating that the name is not
> defined.
> 
> I receive an error such as:
> 
> Traceback (most recent call last):
>   File "M:\My
> Documents\python_code\oracle\maestrodev_oracle_connector.py", line 55,
> in ?
>     db_utils.close()
> AttributeError: 'module' object has no attribute 'close'
> 
> Does anyone have any ideas on how to properly close the connection?
> 
> 
> 
> The db_utils module code is a rather short
> 
> 
> def dbopen(db,uname,passwd):
>     #
>     # Import required system modules needed specifically for function
>     #
>     import cx_Oracle
> 
>     #
>     # Connect to remote database
>     #   
>     connection = cx_Oracle.connect(dsn=db,user=uname,password=passwd)
>   
>     #
>     # Return cursor object to calling program
>     #
>     return(connection.cursor())
> 
> 
> The code that calls the db_utils module is
> 
> #!c:\Python23\python
> #
> # File name: maestrodev_oracle_connector.py
> # Author: Andrew Robert
> # Date: 11/26/04
> #
> #
> # Modification History
> #
> # Version          Programmer                   Description
> # 1.0               AAR                          Creation
> # 1.1               AAR                 Shift database opens to called
> module
> # 1.2               AAR                 Fixed database link close - now
> works
> #
> #
> # Note on modules
> #
> # The imported db_utils module was designed by AAR to make standard
> database
> # routines available to all python programs as callable functions.
> #
> # Called functions are prefaced with the module name and then the
> function
> # within the module.
> #
> 
> 
> import sys,db_utils
> 
> #
> # Make connection to Oracle development database and assign to object
> #
> 
> print 'Establishing connection to remote database\n'
> cursobj = db_utils.dbopen('test_d','FOO','foo')
> 
> #
> # Formulate sample querry
> #
> cursobj.execute('SELECT userid, name, role, desk_phone, pager FROM
> contacts')
> 
> #
> # Extract querry results 
> #
> results=cursobj.fetchall()
> 
> for row in results:
>     print row
> 
> #
> # Break connection to Oracle development database
> #
> print '\n\n\nDisconnecting from remote database'
> 
> db_utils.close()
> 
> raw_input("\n\n\t\tPress Enter To Continue")
> 
> 
> Any help you can provide on this would be greatly appreciated.
> 
> 
> 
> 
> Thank you,
> Andrew Robert
> Systems Architect
> Information Technology 
> Massachusetts Financial Services
> Phone:  617-954-5882
> Pager:   781-764-7321
> E-mail:  arobert at mfs.com
> Linux User Number: #201204
> 
> 
> "MFS Relay Service" made the following
>  annotations on 11/30/2004 11:11:35 AM
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