Hi Alan,
Question1: The output result is an address or line?
Question2: Why are there 54 lines as compared to 27 line in the desired
output?
Here is the latest revised code:
fname = raw_input("Enter file name: ")
if len(fname) < 1 : fname = "mbox-short.txt"
fh = open(fname)
count = 0
addresses = set()
for line in fh:
if line.startswith('From'):
line2 = line.strip()
line3 = line2.split()
line4 = line3[1]
addresses.add(line4)
count = count + 1
print addresses
print "There were", count, "lines in the file with From as the first word"
The output result:
set(['stephen.marqu...@uct.ac.za', 'lo...@media.berkeley.edu', '
zq...@umich.edu', 'rjl...@iupui.edu', 'c...@iupui.edu', 'gsil...@umich.edu',
'wagne...@iupui.edu', 'antra...@caret.cam.ac.uk', '
gopal.ramasammyc...@gmail.com', 'david.horw...@uct.ac.za', '
r...@media.berkeley.edu']) ← Mismatch
There were 54 lines in the file with From as the first word
The desired output result:
stephen.marqu...@uct.ac.za
lo...@media.berkeley.edu
zq...@umich.edu
rjl...@iupui.edu
zq...@umich.edu
rjl...@iupui.edu
c...@iupui.edu
c...@iupui.edu
gsil...@umich.edu
gsil...@umich.edu
zq...@umich.edu
gsil...@umich.edu
wagne...@iupui.edu
zq...@umich.edu
antra...@caret.cam.ac.uk
gopal.ramasammyc...@gmail.com
david.horw...@uct.ac.za
david.horw...@uct.ac.za
david.horw...@uct.ac.za
david.horw...@uct.ac.za
stephen.marqu...@uct.ac.za
lo...@media.berkeley.edu
lo...@media.berkeley.edu
r...@media.berkeley.edu
c...@iupui.edu
c...@iupui.edu
c...@iupui.edu
There were 27 lines in the file with From as the first word
Regards,
Hal
On Sat, Aug 1, 2015 at 1:40 PM, Alan Gauld <alan.ga...@btinternet.com>
wrote:
> On 01/08/15 19:48, Ltc Hotspot wrote:
>
>> There is an indent message in the revised code.
>> Question: Where should I indent the code line for the loop?
>>
>
> Do you understand the role of indentation in Python?
> Everything in the indented block is part of the structure,
> so you need to indent everything that should be executed
> as part of the logical block.
>
> fname = raw_input("Enter file name: ")
>> if len(fname) < 1 : fname = "mbox-short.txt"
>> fh = open(fname)
>> count = 0
>> addresses = set()
>> for line in fh:
>> if line.startswith('From'):
>> line2 = line.strip()
>> line3 = line2.split()
>> line4 = line3[1]
>> addresses.add(line)
>> count = count + 1
>>
>
> Everything after the if line should be indented an extra level
> because you only want to do those things if the line
> startswith From.
>
> And note that, as I suspected, you are adding the whole line
> to the set when you should only be adding the address.
> (ie line4). This would be more obvious if you had
> used meaningful variable names such as:
>
> strippedLine = line.strip()
> tokens = strippedLine.split()
> addr = tokens[1]
> addresses.add(addr)
>
> PS.
> Could you please delete the extra lines from your messages.
> Some people pay by the byte and don't want to receive kilobytes
> of stuff they have already seen multiple times.
>
>
> --
> 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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