On Tue, 2006-02-07 at 23:08, python eager wrote:
> Hi , This is my statment which will work fine. but the statment line
> is long. How to split up these lines .
>
> Code Snippet :
>
> for PID,FIRSTNAME,MIDDLENAME,LASTNAME,
> MARITALSTATUS,EMPLOYEESTATUS,NOD,SALARY,
> POI,RADDRESS,OADDRESS,MNO,LNO,DOBD,DOBM,
> DOBY,DOID,DOIM,DOIY,DOED,DOEM,DOEY in cursor.fetchall():
You could split this up if you place parentheses around the tuple, but
it's probably not a good idea to pollute your namespace with a million
little column names like this. Also, if the set of columns in your query
changes, you'd have to change that for line as well.
An alternative is to define a class whose instances contain the column
values as attributes. Example:
class RowObject(object):
def __init__(self, data, description):
self.__dict__.update(dict(zip([col[0] for col in description], data)))
for rowdata in cursor.fetchall():
row = RowObject(rowdata, cursor.description)
# now you can do stuff with row.PID, row.FIRSTNAME, or however the columns
# in the query are named.
By the way, you might not have to fetch all rows and then loop over the
list that gets returned. Most DB-API modules allow you to iterate over
the cursor:
for rowdata in cursor:
# do stuff
For large result sets this is more efficient because you only process
one row at a time instead of sucking the entire result set into one huge
list.
Hope this helps,
Carsten.
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