RE: Help with python
- From: "edward" <personal.edward@xxxxxxxxx>
- To: <programmingblind@xxxxxxxxxxxxx>
- Date: Tue, 27 Oct 2009 12:58:02 -0400
Hello,
If you don't mind taking a look at this function. It is supposed to take
out duplicate entries in a list but its not working for some reason.
Thanks
Edward
def dup(old_list):
for item in old_list:
if old_list[item] not in new_list:
new_list.apend.item
return new_list
a=['eggs','bread','soda','bread']
b=dup(a)
print b
-----Original Message-----
From: programmingblind-bounce@xxxxxxxxxxxxx
[mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Ken Perry
Sent: Saturday, October 24, 2009 11:55 PM
To: programmingblind@xxxxxxxxxxxxx
Subject: RE: Help with python
Well the key is your instructor said it doesn't have to be in order. The
structure I would use is a dictionary. I am not sure there is a cleaner way
to do this but I can tell you adding to a dictionary in python is one very
fast function so the following is how I would do it. Note the try except
that is there for the first time you add a word to a dictionary that could
also be handled by an if statement that checked to see if there was already
key in the list and adding it if there wasn't like I do in the except
statement but I felt that that would make the code to long.
list=['the','word','the','is','the','mode','of','the','list']
dict={}
for u in list:
try: dict[u]+=1
except: dict[u]=1
print "The unique list is %s\n" % str(dict.keys())
word=''
count=0
for k, v in dict.iteritems():
if v>count:
word=k
count=v
print "the string witht he most is %s and there are %d of them\n" %
(word,count)
-----Original Message-----
From: programmingblind-bounce@xxxxxxxxxxxxx
[mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of edward
Sent: Saturday, October 24, 2009 6:21 PM
To: programmingblind@xxxxxxxxxxxxx
Subject: RE: Help with python
Hello
Thank you for the email.
Yes I think I was reading the problem wrong but I did write the code and it
works fine. Problem two is a problem however.
edward
-----Original Message-----
From: programmingblind-bounce@xxxxxxxxxxxxx
[mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Martin Slack
Sent: Saturday, October 24, 2009 5:57 PM
To: programmingblind@xxxxxxxxxxxxx
Subject: Re: Help with python
I couldn't remember what a mode was so I looked at:
http://www.mathgoodies.com/lessons/vol8/mode.html
It would seem that both problems have to do with counting the numbers of
identical elements in a set or list. Can you write a programme to do that
as a start?
Martin
----- Original Message -----
From: "edward" <personal.edward@xxxxxxxxx>
To: <programmingblind@xxxxxxxxxxxxx>
Sent: Saturday, October 24, 2009 10:02 PM
Subject: Help with python
> hello all,
>
> I have 2 questions on my homework assignment that i cannot figure out.
>
> 1. write a function that will return the mode for a data set. A data
> set is a variable that contains more then one word.
> 2. Write a function called remove_duplicates that takes a list and
> returns
> a
> new list with only the unique elements from the original. Hint: they
> don't have to be in the same order.
>
> any help will be greatly appreciated.
> Edward
>
>
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