[Tutor] Updating an FTP file

[Tim Johnson]

Hello: 
	I'd like to be able to append a line to a file at an FTP site.

#with the following command:
cmd2 = 'RETR cpwd.txt'

# read 'buffer'
line_buffer= []

#the following code will return line_buffer with lines read from the file
ftp.retrlines(cmd2,lines.append)

# I can then add the new line:
lines.append("this is the new line")
#here's where I 'hit the wall':
# How do I 'write' the update list of line back to the
# remote file. 

BTW: have been looking at documentation for ftplib, but can't
seem to get focus on the appropriate method.
Sorry to be so dense.....
Regards
--
Tim Johnson
-----------
"Of all manifestations of power,
 restraint impresses the most."
 -Thucydides