On 09:29 am, n...@craig-wood.com wrote:
Wolfgang Rohdewald <wolfg...@rohdewald.de> wrote:
On Sunday 13 September 2009, Nadav Chernin wrote:
> I'm writing program that read data from some instrument trough
> RS232. This instrument send data in VT100 format. I need only to
> extract the text without all other characters that describe how to
> represent data on the screen. Is there some library in python for
> converting VT100 strings?
that should be easy using regular expressions
At a basic level parsing VT100 is quite easy, so you can get rid of
the VT100 control. They start with ESC, have other characters in the
middle then end with a letter (upper or lowercase), so a regexp will
make short work of them. Something like r"\x1B[^A-Za-z]*[A-Za-z]"
You might need to parse the VT100 stream as VT100 builds up a screen
buffer though and the commands don't always come out in the order you
might expect.
I think twisted has VT100 emulator, but I couldn't find it in a brief
search just now.
Yep, though it's one of the parts of Twisted that only has API
documentation and a few examples, no expository prose-style docs. If
you're feeling brave, though:
http://twistedmatrix.com/documents/current/api/twisted.conch.insults.insults.ITerminalTransport.html
http://twistedmatrix.com/documents/current/api/twisted.conch.insults.insults.ITerminalProtocol.html
http://twistedmatrix.com/projects/conch/documentation/examples/ (the
insults section)
It's not really all that complicated, but without adequate docs it can
still be tricky to figure things out. There's almost always someone on
IRC (#twisted on freenode) to offer real-time help, though.
Jean-Paul
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