[Tutor] small program, but I'm very confused

[Melissa K. Surprenant]

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I have to write a small program for class, and I'm having a terrible
time with it.  I wrote the program, and it seems to me like it should
work, but it doesn't.  I'm sure there are more errors than this, but
right now I get an error when I try to write to the file.  It says I
have invalid syntax, with a carat point towards the file name for the
following line:  f.write('\2\n')

I would appreciate any help anyone would care to offer.  Thank you!

Here is the code:

#!/usr/local/bin/python
import commands
import re
#runs the who command and prints the users
users = [commands.getoutput('who')]
print users

#runs the findall command over users, assigns each one to loginsList
loginsList = re.findall('[a-z]{5}[0-9]{2,3}[a-z]{1}', 'users')

#creates the file
f=open('/tmp/listofusers', 'w')
f.close()
#opens the file for writing
f=open('/tmp/listofusers', 'r+')

#searches the password file, hopefully should write the second regexp to
thefile
for y in loginsList:

re.findall(('^loginsList[y]:x:[0-9]{4}:[0-9]{2,3}:)([A-Za-z]\s[A-Za-z])(.*?)(/n)',
'/etc/passwd')
     f.write('\2\n')

f.close()

print ("Who's on?")

sorteduserfile = [commands.getoutput('sort /tmp/listofusers')]
print sorteduserfile

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