Re: [Tutor] map() practice

2012-10-21 Thread Alan Gauld
On 21/10/12 02:09, Malcolm Newsome wrote: Hello all, I looked at map() tonight. I think I have a decent understanding now of "how" it works. However, I'm wondering when it is most commonly used in the real world and if you could provide some examples (I like to do a lot of web stuff...it that

Re: [Tutor] map() practice

2012-10-21 Thread Peter Otten
Malcolm Newsome wrote: > Hello all, > > I looked at map() tonight. I think I have a decent understanding now of > "how" it works. However, I'm wondering when it is most commonly used in > the real world and if you could provide some examples (I like to do a > lot of web stuff...it that helps wi

Re: [Tutor] managing memory large dictionaries in python

2012-10-21 Thread Steven D'Aprano
On 17/10/12 13:22, Alexander wrote: On Tue, Oct 16, 2012 at 20:43 EST, Mark Lawrence wrote: For the record Access is not a database, or so some geezer called Alex Martelli reckons http://code.activestate.com/lists/python-list/48130/, so please don't shoot the messenger:) Cheers. Mark Lawrence.

Re: [Tutor] instance method call issue

2012-10-21 Thread Steven D'Aprano
Digging up a week-old email from Bob: On 15/10/12 08:37, bob gailer wrote: On 10/14/2012 8:34 AM, Osemeka Osuagwu wrote: except: print 'Cannot display Grid' In addition to Steve's comment I add my own gripe: When delivering an error message tell us WHY. I have seen too many messages "cannot

[Tutor] Print items from 3 lists in order

2012-10-21 Thread Saad Javed
Hi, a = ['Ron', 'Harry', 'Hermoine'] b = ['25th oct', '27th oct', '29th oct'] c = ['Charms', 'DADA', 'Potions'] I want to print like this: Ron - 25th oct Charms Harry - 27th oct DADA Hermoine - 29th oct Potions The items in each list are populated dynamically so I don't know how many items will be

Re: [Tutor] Print items from 3 lists in order

2012-10-21 Thread Dave Angel
On 10/21/2012 08:01 PM, Saad Javed wrote: > Hi, > a = ['Ron', 'Harry', 'Hermoine'] > b = ['25th oct', '27th oct', '29th oct'] > c = ['Charms', 'DADA', 'Potions'] > I want to print like this: > Ron - 25th oct > Charms > Harry - 27th oct > DADA > Hermoine - 29th oct > Potions > > The items in each li

Re: [Tutor] Print items from 3 lists in order

2012-10-21 Thread Alan Gauld
On 22/10/12 01:09, Dave Angel wrote: I tried: for x in zip(a, b, c): print x But that gives: ('Ron', '25th oct', 'Charms') ('Harry', '27th oct', 'DADA') ('Hermoine', '29th oct', 'Potions') ??? So all you have now is a formatting problem. Very good; you're close. instead of z, just use

[Tutor] Populating a list

2012-10-21 Thread Saad Javed
My program downloads multiple entry values from the net. I'm trying to combine them in a list in a particular sequence. l = [] feed1 = urllib2.urlopen(rssPage1) tree1 = etree.parse(feed1) x = tree1.xpath("/rss/channel/item/title/text()") y = tree1.xpath("/rss/channel/item/pubDate/text()") z = tree

Re: [Tutor] Populating a list

2012-10-21 Thread Alexander
On Sun, Oct 21, 2012 at 9:44 PM, Saad Javed wrote: > My program downloads multiple entry values from the net. I'm trying to > combine them in a list in a particular sequence. > > l = [] > feed1 = urllib2.urlopen(rssPage1) > tree1 = etree.parse(feed1) > x = tree1.xpath("/rss/channel/item/title/text

Re: [Tutor] Populating a list

2012-10-21 Thread Steven D'Aprano
On Mon, Oct 22, 2012 at 06:44:51AM +0500, Saad Javed wrote: > My program downloads multiple entry values from the net. I'm trying to > combine them in a list in a particular sequence. > > l = [] [snip rest of code] > l.append([e, f, g]) > The problem I'm facing is that the values don't combine i