cedric briner wrote:
> To let you know, I'm writing a script to generate bind9 configuration
> from a nis hosts table. So I was trying in a one re to catch from this:
>
> <ip> <hostname> [ <cname> ...] [# comment]
> e.g:
> 10.12.23.45 hostname1 alias1 alias2 alias3 # there is a nice comment
> 37.64.86.23 hostname2
> 35.25.89.34 hostname3 alias5
> .. ..
>
>
> so I was wishing to write an re expresion which will do in a one step
> all the job ! maybe am'I expecting too much from re :)
You can use an re to get the four primary fields, then use split() to
break up the aliases. Try this:
import re
data = '''10.12.23.45 hostname1 alias1 alias2 alias3 # there is a nice
comment
37.64.86.23 hostname2
35.25.89.34 hostname3 alias5
'''.splitlines()
for line in data:
match = re.search(r'^(\S+)\s+(\S+)([^#]*)(#.*)?$', line)
if match:
ip, host, aliases, comment = match.group(1, 2, 3, 4)
print 'ip:', ip
print 'host:', host
if aliases:
aliases = aliases.strip().split()
for alias in aliases:
print 'alias:', alias
if comment:
print comment
print
Kent
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