dos2unix.py

#!/usr/bin/env python
"""\
convert dos linefeeds (crlf) to unix (lf)
usage: dos2unix.py <input> <output>
"""

__version__ = "1"  # version is needed for packaging

import sys

if len(sys.argv[1:]) != 2:
    sys.exit(__doc__)

content = ''
outsize = 0
with open(sys.argv[1], 'rb') as infile:
    content = infile.read()
with open(sys.argv[2], 'wb') as output:
    for line in content.splitlines():
        outsize += len(line) + 1
        output.write(line + b'\n')

print("Done. Stripped %s bytes." % (len(content) - outsize))