Building Very Large Records

Alex Martelli aleaxit at
Sat Sep 11 00:17:27 CEST 2004

Greg Lindstrom <greg.lindstrom at> wrote:

> Hello-
> I am working on a routine to pull information from an Oracle database and
> format it into fixed-length records.  My problem is that the record layout
> is quite long (over 500 bytes) and contains dozens of fields.  How would
> *you* go about building such a beast?  I know that using the += operator is
> a bad idea, as it creates a new copy of the string each time.  How about the
> struct.pack() method?  A very big '%-12.12s%-50.50s.......' statement?

Yep, except that what you're quoting ain't a statement, just a string.
But put a % after it and the right tuple after that, and you''re going


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