append log file

[AK]

In article <bla2rc$4b3$1 at news.uni-kl.de>, Tom wrote:
> Hi,
> I have a log file and of course I want to add the new information to the 
> end of that log file. Unfortunately I always delete the old information 
> and only append the current info.
> 
> Right now I do it like this:
> I call a module which consists of a class and a function. It actually 
> doesn't matter, but I just included it for the sake of completeness.
> The module looks like this:
> 
> class log_C:
>     def errorlog(self, filename, Data, d):
>         LogFile = file(filename, 'w')

Why not ... open(filename ... ? Then 'a' should work. (or at least works
here).

>         ErrorInfo = Data[d+1]
>         LogFile.write(ErrorInfo)
>         LogFile.close()
> 
> How can I add the new info without deleting the old info?
> I tried the modes 'a' and 'a+' but they both didn't work. Actually the 
> data was totally unreadable! It was kind of messed up. :-( I don't know why.
> 
> Thanks for your help.
> Regards, Tom


>