Python3 cat example

gistfile1.txt

## in answer to Armin Ronacher's http://lucumr.pocoo.org/2014/5/12/everything-about-unicode/


import sys
import shutil

for filename in sys.argv[1:]:
    f = sys.stdin.buffer
    if filename != '-':
        try:
            f = open(filename, 'rb')
        except IOError as err:
            print >> sys.stderr, 'cat.py: %s: %s' % (filename, err)
            continue
    with f:
        shutil.copyfileobj(f, sys.stdout.buffer)
        

NOTE: there are issues with threading and the milti-level buffering at the higher level (sys.stdin/sys.stdout) when doing this. proper flushing should be used before and after talking to the stdin/stdout buffer attribute, and locking in threaded applications.

PPS: I am NOT saying that Python3 does not have HUGE problems with unicode. Just that this example is no where near as good as all the other past problems Armin has pointed out.

The point of this is to help people running into the same problem, with a sane workaround.