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To: python-list@python.org
From: Dennis Lee Bieber <wlfraed@ix.netcom.com>
Subject: Re: suppress newlines in my script
Date: Sat, 25 May 2013 13:33:06 -0400
Organization: > Bestiaria Support Staff <
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On Fri, 24 May 2013 21:49:24 -0600, Jason Friedman <jsf80238@gmail.com>
declaimed the following in gmane.comp.python.general:

> > Here are two lines from the CSV file:
> > ,,172.20.{0}.0/27,172.20.{0}.32/27,172.20.{0}.64/27,29,172.20.{0}.96/27,,,,172.21.{0}.0/27,172.21.{0}.32/27,172.21.{0}.64/27,29,172.21.{0}.96/27
> > GW:,,172.20.{0}.1,172.20.{0}.33,172.20.{0}.65,,172.20.{0}.97,,GW:,,172.21.{0}.1,172.21.{0}.33,172.21.{0}.65,,172.21.{0}.97
> >
> > This is the output:
> > ,,,,,,,,,,,,,,
> >
> > ,,,,,,,,,,,,,,
> > GW:,,172.20.126.129,172.20.126.161,172.20.126.193,,172.20.126.225,,GW:,,172.21.126.129,172.21.126.161,172.21.126.193,,172.21.126.225
> >
> > ''''''''''''''''''
> 
> When you say "this is the output" do you mean that is what you are
> getting or that is what you want?  If that is what you are getting
> please reply with what you want for output.

	Considering that, off hand, there is no viable way to match input

GW:,,172.20.{0}.1

to output

GW:,,172.20.126.129

except by assuming that those are not the output for the sample input.

	The "first" sample input appears to be a comma separated list of IP
netmask definitions in which the third octet is a placeholder to be
filled in later, and the fourth octet defines the starting address of
each subnet.

	The second input line appears to be a list if IPs, again with a
placeholder for the third octet, and in which the fourth octet is the
first "assignable" address in the subnet.

	Both (input and output) seem to have the inconsistancy of:

a)	Based on the GW appearing twice on a line it looks almost like there
are TWO records per line

b)	Inexplicable gaps in the records, shown by the ,, pairs

	Just from the samples, most of the output can be generated
algorithmically...

-=-=-=-=-=-
template = "172.%d.%d.%d"

out = ["GW:", ""]
for mnet in [ 20, 21, 22 ]:
    for net in [ 126, 127 ]:
        for snet in range(1, 255, 32):
            if len(out) == 6:
                out.extend(["", "GW:", ""])
            out.append(template % (mnet, net, snet))
        print ",".join(out)
        out = ["GW:", ""]
                           
if len(out) > 2:
    print ",".join(out)

-=-=-=-=-=-
GW:,,172.20.126.1,172.20.126.33,172.20.126.65,172.20.126.97,,GW:,,172.20.126.129,172.20.126.161,172.20.126.193,172.20.126.225
GW:,,172.20.127.1,172.20.127.33,172.20.127.65,172.20.127.97,,GW:,,172.20.127.129,172.20.127.161,172.20.127.193,172.20.127.225
GW:,,172.21.126.1,172.21.126.33,172.21.126.65,172.21.126.97,,GW:,,172.21.126.129,172.21.126.161,172.21.126.193,172.21.126.225
GW:,,172.21.127.1,172.21.127.33,172.21.127.65,172.21.127.97,,GW:,,172.21.127.129,172.21.127.161,172.21.127.193,172.21.127.225
GW:,,172.22.126.1,172.22.126.33,172.22.126.65,172.22.126.97,,GW:,,172.22.126.129,172.22.126.161,172.22.126.193,172.22.126.225
GW:,,172.22.127.1,172.22.127.33,172.22.127.65,172.22.127.97,,GW:,,172.22.127.129,172.22.127.161,172.22.127.193,172.22.127.225
-- 
	Wulfraed                 Dennis Lee Bieber         AF6VN
        wlfraed@ix.netcom.com    HTTP://wlfraed.home.netcom.com/