Python FTP - NameError: name 'mydpa' is not defined

[Ej]

I have a similar problem. I need to download the same file every hour
so it will be nice to be able to rename the downloads with a variable
name.

For example in this case:

from ftplib import FTP
ftp=FTP('tgftp.nws.noaa.gov')
ftp.login()
ftp.cwd('SL.us008001/DF.of/DC.radar/DS.81dpr/SI.kbuf')
ftp.retrbinar('RETR sn.last', open('sn','wb').write)
ftp.quit()

Question: How to achive rename the downloaded files as sn1, sn2,
sn3.... or with a timestamp?
The ftp.rename() is used to rename files on the server, isn't it?I'm
Python shy. Please help.

Any suggestion will be appreciated.





On Jul 28, 11:41 am, MRAB <goo... at mrabarnett.plus.com> wrote:
> On Jul 28, 2:27 pm, "Harry" <laiyi... at yahoo.ca> wrote:
>
> > Hi there. I am trying to download a file(sn.last) from a public FTP
> > server with the following code:
>
> > from ftplib import FTP
> > ftp=FTP('tgftp.nws.noaa.gov')
> > ftp.login()
> > ftp.cwd('SL.us008001/DF.of/DC.radar/DS.81dpr/SI.kbuf')
> > ftp.retrbinar('RETR sn.last', open(mydpa,'wb').write)
>
> open(mydpa,'wb') would open the file to which you're saving the data,
> but you haven't defined to mydpa, so Python will complain.
>
> > ftp.quit()
>
> > but got an error message, which I think is normal:
>
> > Traceback (most recent call last):
> >   File "<pyshell#13>", line 1, in <module>
> >     ftp.retrbinary('RETR sn.last', open(mydpa,'wb').write)
> > NameError: name 'mydpa' is not defined
>
> Yep!
>
>
>
> > I don't know much about python, but just try to use the code to
> > download data. I don't know where the file will be saved to. Is the
> > mydata a file name or a folder name? where will it be saved to even
> > if it's working? Please help be fixed the problem step by step? I am
> > using 2.5.2 by the way.
>
> You need to tell it where to save the data by defining mydpa.
>
>
>
> > I really appreciate your help. Thanks.- Hide quoted text -
>
> - Show quoted text -