Can I use an opened gzip file with Popen in Python?
- by eric.frederich
I have a little command line tool that reads from stdin.
On the command line I would run either...
./foo < bar
or ...
cat bar | ./foo
With a gziped file I can run
zcat bar.gz | ./foo
in Python I can do ...
Popen(["./foo", ], stdin=open('bar'), stdout=PIPE, stderr=PIPE)
but I can't do
import gzip
Popen(["./foo", ], stdin=gzip.open('bar'), stdout=PIPE, stderr=PIPE)
I wind up having to run
p0 = Popen(["zcat", "bar"], stdout=PIPE, stderr=PIPE)
Popen(["./foo", ], stdin=p0.stdout, stdout=PIPE, stderr=PIPE)
Am I doing something wrong?
Why can't I use gzip.open('bar') as an stdin arg to Popen?
