Problems with read_eager and Telnet

[kenansharon at gmail.com]

On Monday, 28 February 2011 10:54:56 UTC-5, Robi  wrote:
> Hi everybody,
>  I'm totally new to Python but well motivated :-)
> 
> I'm fooling around with Python in order to interface with FlightGear
> using a telnet connection.
> 
> I can do what I had in mind (send some commands and read output from
> Flightgear using the telnetlib) with a read_until() object to catch
> every output line I need, but it proved to be very slow (it takes 1/10
> of a sec for every read_until().
> 
> I tried using the read_eager() object and it's waaaayyyy faster (it
> does the job in 1/100 of a sec, maybe more, I didn't tested) but it
> gives me problems, it gets back strange strings, repeated ones,
> partially broken ones, well ... I don't know what's going on with it.
> 
> You see, I don't know telnet (the protocol) very good, I'm very new to
> Python and Python's docs are not very specific about that read_eager(9
> stuff.
> 
> Could someone point me to some more documentation about that? or at
> least help me in getting a correct idea of what's going on with
> read_eager()?
> 
> I'm going on investigating but a help from here would be very
> appreciated :-)
> 
> Thanks in advance,
>    Roberto

Say a can someone explain for me how read_eager and read _very_eager decide when to stop reading date from a socket?

If the command sent causes the server to reply with multiple lines how do the Python functions decide when to stop accepting new data from the socket?