[Python-bugs-list] [ python-Feature Requests-662923 ] iterator for dbm keys

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Feature Requests item #662923, was opened at 2003-01-05 21:34
Message generated for change (Comment added) made by rhettinger
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Category: Python Library
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: paul rubin (phr)
Assigned to: Nobody/Anonymous (nobody)
Summary: iterator for dbm keys

Initial Comment:
if d is a dbm (gdbm, bsddb, shelve, etc.) object, then

"for k in d"

should iterate through the keys of d, like you can do

with dicts.  Alternatively, add a new operation,

d.xkeys(), which returns an iterator that steps through

all the keys in d.  d.keys() is often inappropriate

since dbm databases can be extremely large and d.keys()

tries to read all the keys into memory at once.



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>Comment By: Raymond Hettinger (rhettinger)
Date: 2003-09-12 01:36

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bsddb and dbhash were missed for Py2.3.

Adding the to Py2.4.

See:

   Lib/bsddb/__init__.py 1.6

   Lib/test/test_bsddb.py 1.13

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Comment By: Raymond Hettinger (rhettinger)
Date: 2003-05-12 13:08

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I think this was taken case of for Python 2.3.  Please 

check to see if all of your needs have been met.  If so, 

please close the request.  If not, paste a patch (applying 

UserDict.DictMixin) for anything that was missed.

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Comment By: paul rubin (phr)
Date: 2003-02-08 05:27

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That's nice about shelve, but really, all the dbm classes

need this operation.

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Comment By: Raymond Hettinger (rhettinger)
Date: 2003-01-10 04:47

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* for Py2.3, all shelve now inherits from UserDict.DictMixin 

which adds in the missing methods for a dictionary style 

interface.



* the appropriate name for d.xkeys() is d.iterkeys().

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