[Tutor] Dictionary Issue

[Ltc Hotspot]

The revised output reads:

In [3]: %run assignment_9_4_9.py
Enter file name: mbox-short.txt
cwen at iupui.edu 14

The desired output: cwen at iupui.edu 5


Question: How do I trace the source of the count?

Revised data code reads:

fname = raw_input("Enter file name: ")
handle = open (fname, 'r')
count = dict ()
for line in handle:
    if line.startswith("From: "):
        address = line.split()[1]

        for wrd in address:
            count[wrd]= count.get(wrd,0) +1

maxval = None
maxkee = None
for kee, val in count.items():

        maxval = val
        maxkee = kee

print address, val





On Wed, Aug 5, 2015 at 4:11 PM, Alan Gauld <alan.gauld at btinternet.com>
wrote:

> On 05/08/15 15:15, Ltc Hotspot wrote:
>
> Raw data code reads:
>>
>
> Being picky here but data and code are very different
> things (in most languages at least) and what you have
> below is definitely code not data.
>
> Meanwhile there are lots of issues in this code...
>
> fname = raw_input("Enter file name: ")
>> handle = open (fname, 'r')
>> text = handle.read()
>>
>> ## The program looks for 'From ' lines and takes the second
>> ## word of those lines as the person who sent the mail.
>>
>> addresses = set()
>> for addr in [ text.split()[2]('From  ')
>>      if fromline
>>
>
> The above looks like its supposed to be a list
> comprehension embedded in a for loop. Putting too much
> code in one line is usually a bad idea especially before
> you have it working.
>
> Try separating out the formation of your list from the
> for loop. Once you get the comprehension working correctly
> then you can consider embedding it.
>
> As for the expression
>
> text.split()[2]('From  ')
>
> Can you explain how you think that works?
> Try it at the >>> prompt with text set to
> a sample line of data.
>
>
--> What command did you type to get the triple chevrons ?

--> My python interpreter:  iPython (py.2.7)


> Try
>
> >>> text = ...... # whatever your data looks like
> >>> text.split()
>
> >>> text.split[2]
>
> >>> text.split()[2]('From  ')
>

-->  address data, review the latest revised code?


>
> The >>> prompt is one of your most powerful tools while
> writing code, you should always have one ready to try
> stuff out. You can answer a lot of questions that way.
>
> ## The program creates a Python dictionary that maps
>> ## the sender's mail address to a count of the number
>> ## of times they appear in the file.
>>
>>          count = dict()
>>          for wrd in word:
>>
>
> What is word? You don't define it anywhere?
>
>              count[wrd]= count.get(wrd,0) +1
>>
>> ## After the dictionary is produced, the program reads
>> ## through the dictionary using a maximum loop to
>>
>
>> --> imported address data, review revised code?


>
>
>
>
> --
> Alan G
> Author of the Learn to Program web site
> http://www.alan-g.me.uk/
> http://www.amazon.com/author/alan_gauld
> Follow my photo-blog on Flickr at:
> http://www.flickr.com/photos/alangauldphotos
>
>
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