Re: quick python question
- From: Jim Dunleavy <jim.dunleavy@xxxxxx>
- To: programmingblind@xxxxxxxxxxxxx
- Date: Fri, 03 Apr 2009 16:57:01 +0100
Hi Jim,
items() returns a new list in memory, so if your dictionary is very big
it could be a problem.
iteritems() is lazy, it creates an iterator object which keeps track
of the current state, so it doesn't build a list in advance.
Python 3.0 uses the lazy method, so that items behaves like iteritems
and range behaves like xrange, and so on.
--Jim
----- Original Message -----
From: Homme, James
To: programmingblind@xxxxxxxxxxxxx
Sent: Friday, April 03, 2009 3:29 PM
Subject: RE: quick python question
Hi Jim,
What's the difference between the two syntaxes in the way Python handles this?
Is it 3.0 as opposed to older Python?
Thanks.
Jim
----------
Jim Homme, Usability Engineering.
412-544-1810.
Catch the gratitude attitude.
From: programmingblind-bounce@xxxxxxxxxxxxx
[mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Jim Dunleavy
Sent: Friday, April 03, 2009 9:28 AM
To: programmingblind@xxxxxxxxxxxxx
Subject: Re: quick python question
Hi Tyler,
That just iterates on the keys.
You need to do:
for key, val in self.vars.iteritems():
or
for key, val in self.vars.items():
--Jim
----- Original Message -----
From: Tyler Littlefield
To: programmingblind@xxxxxxxxxxxxx
Sent: Friday, April 03, 2009 12:02 PM
Subject: quick python question
Hello list,
I've got a question; I'm trying to itterate through a dictionary like:
for key,val in self.vars:
print key
print val
when I do it, it says "to many values to unpack."
What's that supposed to mean? Is there a way of debugging the code so I can
make sure this is really a dictionary?
Thanks,
Tyler Littlefield
Web: tysdomain.com
email: tyler@xxxxxxxxxxxxx
My programs don't have bugs, they're called randomly added features.
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