February 2006
Intermediate to advanced
648 pages
14h 53m
English
Content preview from Python: Essential Reference, Third Edition
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shelve
The shelve module provides support for persistent objects using a special “shelf” object. This object behaves like a dictionary except that all the objects it contains are stored on disk using a database such as dbm or gdbm. A shelf is created using the shelve.open() function.
open(filename [, flag=’c’ [, protocol [, writeback]]])Opens a shelf file. If the file doesn’t exist, it’s created. filename should be the database filename and should not include a suffix. flag has the same meaning as described in the chapter introduction and is one of ‘r’, ‘w’, ‘c’, or ‘n’. If the database file doesn’t exist, it is created. protocol specifies the protocol used to pickle objects stored in the database. It has the same meaning as described in the ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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