line-endings counter and converter (when you have mixed LF and CRLF in one file)

line-endings

#!/usr/bin/python
import sys
from subprocess import call

def main():
	if len(sys.argv) == 3 and sys.argv[1] == "-c":
		filename = sys.argv[2]
		(all, dos, nix) = doWork(filename)
		cmd = "unix2dos" if dos > nix else "dos2unix"
		call([cmd, "-q", "-k", filename])
	elif len(sys.argv) == 2:
		filename = sys.argv[1]
		data = doWork(filename)
		print "all {}	dos {}	unix {}".format(*data)
	else:
		#print help
		help()

def doWork(filename):
	with open(filename, 'r') as infile:
		data = infile.read()
		return count(data)
		
		
def count(data):
	all = data.count("\n")
	dos = data.count("\r\n")
	nix = all - dos
	return (all, dos, nix)
		

def help():
	print "Count line endings in file: DOS and UNIX"
	print "Usage: line-endings [-c] filename"
	print " -c	converts to DOS/UNIX format according to majority of line-endings of that kind"

	
if __name__ == "__main__":
	main()