AttributeError

Ltc Hotspot ltc.hotspot at gmail.com
Wed Aug 12 05:05:48 CEST 2015


Chris,

Check the code and the visualize execution of the code, available at
http://tinyurl.com/p8tgd5h

message reads: NameError: name 'collections' is not defined


Regards,
Hal

On Tue, Aug 11, 2015 at 5:49 PM, Chris Angelico <rosuav at gmail.com> wrote:

> On Wed, Aug 12, 2015 at 10:43 AM, Ltc Hotspot <ltc.hotspot at gmail.com>
> wrote:
> > Python can pull the hour from the 'From ' line by finding the time and
> then
> > splitting the string a second time using a colon, i.e., From
> > stephen.marquard at uct.ac.za Sat Jan  5 09:14:16 2008
> >
> > Finally, accumulated the counts for each hour, print out the counts,
> sorted
> > by hour as shown below:
>
> In that case, you want to sort the entire collection, not a single
> key-value pair.
>
> It seems to me you can do this fairly efficiently with collections.Counter.
>
> import collections
> with open(raw_input("Enter file name: ")) as f:
>     counts = collections.Counter(line.split()[5].rstrip() for line in
> f if line.startswith("From "))
>
> counts = counts.items()
> counts.sort()
> for hour, count in counts:
>     print hour, count
>
> The most important part is getting items() and then sorting the whole
> thing.
>
> ChrisA
> --
> https://mail.python.org/mailman/listinfo/python-list
>
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