On Friday 08 February 2008 12:10, jim-on-linux wrote: > On Friday 08 February 2008 03:36, waltbrad > > wrote: > > Working through the Mark Lutz book > > Programming Python 3rd Edition. > > > > A couple of modules in the "Preview" > > chapter give me errors. Both on a > > shelve.open call: > > > > Pretty simple code, (2nd example): > from; jim-on-linux http://[EMAIL PROTECTED] > My guess, add this and see if it helps
also try import anydbm if not on linux, or import dbhash will work on linux > > =====code begin===== > > import dbhash > > > import shelve > > from people import Person, Manager > > > > bob = Person('Bob Smith', 42, 30000, > > 'sweng') sue = Person('Sue Jones', 45, > > 40000, 'music') tom = Manager('Tom Doe', > > 50, 50000) > > > > db = shelve.open('class-shelve') > > db['bob'] = bob > > db['sue'] = sue > > db['tom'] = tom > > db.close() > > ====code end==== > > > > Error message++++++++ > > Traceback (most recent call last): > > File "make_db_classes.py", line 9, in > > <module> db = > > shelve.open('class-shelve') File > > "C:\PYTHON25\lib\shelve.py", line 225, > > in open return > > DbfilenameShelf(filename, flag, > > protocol, writeback) File > > "C:\PYTHON25\lib\shelve.py", line 209, > > in __init__ Shelf.__init__(self, > > anydbm.open(filename, flag), protocol, > > writeback) > > File "C:\PYTHON25\lib\anydbm.py", line > > 83, in open return mod.open(file, flag, > > mode) File "C:\PYTHON25\lib\dbhash.py", > > line 16, in open return > > bsddb.hashopen(file, flag, mode) File > > "C:\PYTHON25\lib\bsddb\__init__.py", > > line 306, in hashopen d.open(file, > > db.DB_HASH, flags, mode) > > bsddb.db.DBError: (5, 'Input/output > > error') ++++++++++End Error message > > > > I've looked on the errata pages of his > > website and used Google to find someone > > else who ran into this problem. Found > > someone else who had a similar error but > > no explanation was given. No other > > reader of the book seems to have had the > > problem. > > > > I'm using 2.5.1 > > > > I thought maybe the file had to exist > > before it could be opened, so I created > > one with that name, but no dice. A > > different but similar set of errors. I > > also thought maybe there had to be a > > second argument like 'a', 'r' or 'w'. > > That doesn't work either. > > > > This is the first chapter of the book. > > It's an overview of the language > > features. So, this is pretty perplexing. > > Any help would be appreciated. Thanks. -- http://mail.python.org/mailman/listinfo/python-list