inpipe and outpipe (and other useful functions)
Ole Martin Bjørndalen
ombdalen at gmail.com
Sun Aug 28 12:19:54 CEST 2011
Please excuse me if this i common knowledge, or if I've one again
that turned out to be in the standard library, but I think I came up
with something rather neat.
I'm writing a lot of programs that call external programs, and as much
as I love subproces.Popen, I do get tired of writing
rather wordy things like:
args = ['cmd', 'arg1', 'arg2', 'etc']
p = subprocess.Popen(args, stdin=subprocess.PIPE)
for line in p:
line = line.decode('latin1')
so last week I had enough, and I sat down and wrote a few functions.
No I can do:
from lib import inpipe
for line in inpipe(args, encoding='latin1'):
from lib import outpipe
with outpipe(args, addnl=True) as write:
write('Python is awesome!')
Some code from a program I'm writing:
args = ['metaflac',
for line in stripped(inpipe(args)):
(name, value) = line.split('=')
# ... process tag
Now, that is a lot more readable than what I had before!
The library has a lot of other things in it as well, and is available here:
I love Python!
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