Emile,
--> Captured is a printout from line3 to addresses, below:
In [46]: print line3
[]
In [47]: print line2.split()
[]
In [48]: print line2
In [49]: print line.strip()
In [50]: print fh
<open file 'mbox-short.txt', mode 'r' at 0x00000000035CB0C0>
In [51]: print addresses
set(['1.0', 'sou...@collab.sakaiproject.org;', 'Jan', 'mail.umich.edu', 'Innocen
t', '0.0000', 'CMU', 'frankenstein.mail.umich.edu', '0.8475', 'from', 'source@co
llab.sakaiproject.org', '05', '<200801051412.m05eciah010...@nakamura.uits.iupui.
edu>', 'flawless.mail.umich.edu', '5', 'nakamura.uits.iupui.edu:', 'shmi.uhi.ac.
uk', '7bit', 'text/plain;', '<sou...@collab.sakaiproject.org>;', 'Sat,', 'nakamu
ra.uits.iupui.edu', 'paploo.uhi.ac.uk', 'FROM', 'holes.mr.itd.umich.edu', '(from
', '<postmas...@collab.sakaiproject.org>', '[sakai]', 'stephen.marqu...@uct.ac.z
a', 'Sat'])
In [52]:
→Original Traceback error message:
IndexError
Traceback (most recent call last)
C:\Users\vm\Desktop\apps\docs\Python\_8_5_v_21.py in <module>()
7 line2 = line.strip()
8 line3 = line2.split()
----> 9 line4 = line3[1]
10 addresses.add(line4)
11 count = count + 1
IndexError: list index out of range
→ Latest code printout:
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:
line2 = line.strip()
line3 = line2.split()
line4 = line3[1]
addresses.add(line4)
count = count + 1
print "There were", count, "lines in the file with From as the first word"
print addresses
→ I swapped line statements between lines 4 & 5. No change on the Traceback
error message:
IndexError
Traceback (most recent call last)
C:\Users\vm\Desktop\apps\docs\Python\_8_5_v_21.py in <module>()
8 line2 = line.strip()
9 line3 = line2.split()
---> 10 line4 = line3[1]
11 addresses.add(line4)
12 count = count + 1
IndexError: list index out of range
In [54]: print line3
→Question: The file data content is lost on execution of the sort function?
Regards,
Hal
Sent from Surface
From: Emile van Sebille
Sent: Friday, July 31, 2015 4:16 PM
To: Tutor@python.org
On 7/31/2015 11:57 AM, ltc.hots...@gmail.com wrote:
> →Question: Why is the list index out of range on line # 9:
>
> IndexError
>
> Traceback (most recent call last)
> C:\Users\vm\Desktop\apps\docs\Python\assinment_8_5_v_20.py in <module>()
> 7 line2 = line.strip()
> 8 line3 = line2.split()
> ----> 9 line4 = line3[1]
> 10 addresses.add(line4)
> 11 count = count + 1
> IndexError: list index out of range
>
Because line3 is not sub-scriptable.
Have you examined what line3 holds when the error occurs?
Emile
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