Problem with split() and rstrip()

[guiromero]

Hello!

I have the following assgnment:

Open the file mbox-short.txt and read it line by line. When you find a line that starts with 'From ' like the following line:

From [e-mail] Sat Jan 5 09:14:16 2008

You will parse the From line using split() and print out the second word in the line (i.e. the entire address of the person who sent the message). Then print out a count at the end.
Hint: make sure not to include the lines that start with 'From:'. Also look at the last line of the sample output to see how to print the count.

You can download the sample data at http://www.py4e.com/code3/mbox-short.txt

The output should be:

[e-mail]
[e-mail]
[e-mail]
[e-mail]
[e-mail]
[e-mail]
[e-mail]
[e-mail]
[e-mail]
[e-mail]
[e-mail]
[e-mail]
[e-mail]
[e-mail]
[e-mail]
[e-mail]
[e-mail]
[e-mail]
[e-mail]
[e-mail]
[e-mail]
[e-mail]
[e-mail]
[e-mail]
[e-mail]
[e-mail]
[e-mail]
There were 27 lines in the file with From as the first word



I tried it with the code below:

``````````
fname = input("Enter file name: ")
if len(fname) < 1:
fname = "mbox-short.txt"

fh = open(fname)
count = 0
for line in fh:
if line.startswith('From:'):
pass
elif line.startswith('From'):
x = line.split('From') and line.rstrip(' SatFriThuJn0123456789:')
print(x)

count = count + 1

print("There were", count, "lines in the file with From as the first word")

```````````````

The output I'm getting is the following:


From [e-mail] Sat Jan 5 09:14:16 2008 ← Mismatch

From [e-mail] Fri Jan 4 18:10:48 2008

From [e-mail] Fri Jan 4 16:10:39 2008

From [e-mail] Fri Jan 4 15:46:24 2008

From [e-mail] Fri Jan 4 15:03:18 2008

From [e-mail] Fri Jan 4 14:50:18 2008

From [e-mail] Fri Jan 4 11:37:30 2008

From [e-mail] Fri Jan 4 11:35:08 2008

From [e-mail] Fri Jan 4 11:12:37 2008

From [e-mail] Fri Jan 4 11:11:52 2008

From [e-mail] Fri Jan 4 11:11:03 2008

From [e-mail] Fri Jan 4 11:10:22 2008

From [e-mail] Fri Jan 4 10:38:42 2008

From [e-mail] Fri Jan 4 10:17:43 2008

From [e-mail] Fri Jan 4 10:04:14 2008

From [e-mail] Fri Jan 4 09:05:31 2008

From [e-mail] Fri Jan 4 07:02:32 2008

From [e-mail] Fri Jan 4 06:08:27 2008

From [e-mail] Fri Jan 4 04:49:08 2008

From [e-mail] Fri Jan 4 04:33:44 2008

From [e-mail] Fri Jan 4 04:07:34 2008

From [e-mail] Thu Jan 3 19:51:21 2008

From [e-mail] Thu Jan 3 17:18:23 2008

From [e-mail] Thu Jan 3 17:07:00 2008

From [e-mail] Thu Jan 3 16:34:40 2008

From [e-mail] Thu Jan 3 16:29:07 2008

From [e-mail] Thu Jan 3 16:23:48 2008

There were 27 lines in the file with From as the first word[


As you can see, the last line is correct (count)and the email addresses are at the right order....but I'm not being able to remove "From" at the beginning of the lines neither the dates at the end of the lines. Another thing is that the lines are skipped and they shoudn't.


Could someone help me with that task, please?

[dev7060]

From [e-mail] Sat Jan 5 09:14:16 2008

You will parse the From line using split() and print out the second word in the line (i.e. the entire address of the person who sent the message).

x = line.split(' ')[1]

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[pritikumari]

The rstrip() method removes any trailing characters at the end a string, space is the default trailing character*to*remove.

I have looked at a lot of other people's questions/answers about split and strip, and I think that maybe some of my problem is that my initial code splits the text by line, thus giving me lists to work with, when in actuality, each of my lines is still a string that I need to break up and NOT a list, but because of python syntax I have to work with the string as if it were a list. Please, any advice you can give me that would help me understand what my problem is and how to fix it would be*so*appreciated.

[Arushi]

The correct code to achieve the desired output should be:

fname = input("Enter file name: ")
if len(fname) < 1:
fname = "mbox-short.txt"
 
fh = open(fname)
count = 0
for line in fh:
if line.startswith('From:'):
pass
elif line.startswith('From'):
words = line.split()
email = words[1]
print(email)
 
count = count + 1
 
print("There were", count, "lines in the file with From as the first word")