pyserial and file open conflict?

[Henrique Dante de Almeida]

Em Thu, 15 May 2008 08:03:40 -0700, p.wallstedt escreveu:

> Hi all!
> 
> I have a small but rather annoying problem with pyserial. I want to open
> a file on disk for reading and then open a com-port, write lines from
> the file to the port and then read something back and compare it to the
> next line in the file. Should be simple. And it is, apart from the fact
> that the file seems to be doubled ...? Or it loops through the file
> twice.
> 
> If I exclude the "import serial" it works.
> 
> Any ideas?
> 
> thanks
> Peter

 Are you sure you need to reinvent the wheel ? For example, pppd has the 
"chat" application:

 http://www.hmug.org/man/8/chat.php