[Tutor] FTP retrieve

[Kent Johnson]

Øyvind wrote:
> I have opened an FTP connection, and use the following to download a logfile:
> 
> f = open('c:///web.log','w')
> ftp.retrlines('RETR ex050202.log', f.write)
> 
> I have also tried with f.writelines.
> 
> It works, but not as well as I would like. All the \n's are removed. How
> can I download an exact copy, so that each line actually ends up being on
> a separate line?

Define your own callback that inserts the missing \n:

f = open('c:///web.log','w')
def cb(line):
     f.write(line)
     f.write('\n')

ftp.retrlines('RETR ex050202.log', cb)

Note that this callback relies on f being accessible as a global.

Kent