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#!/usr/bin/env python
import sys
from shutil import copyfileobj as copy
import os.path
PY3 = sys.version_info[0] == 3
if __name__ == '__main__':
for filename in sys.argv[1:] or ["-"]:
if filename == "-":
copy(sys.stdin, sys.stdout)
else:
if os.path.exists(filename):
with open(filename, 'r' if PY3 else 'rb') as file:
copy(file, sys.stdout)
else:
sys.stderr.write('cat.py: {0}: No such file or directory\n'.format(filename))
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