# Program to print file contents with line number prepended to each line
# This one writes to a file with the same base name but with ".lst" appended
# Matt Bishop, Apr. 17, 2009
# for ECS 10 Spring 2009
#
import string;

def main():
	# get input file name
	iname = raw_input("Please enter the name of the file to print:");
	# get the listing file name
	pos = string.rfind(iname, ".");
	oname = iname[0:pos] + ".lst"
	#
	# open input, output files
	#
	infile = open(iname, 'r');
	outfile = open(oname, 'w');
	#
	#	line by line, adding line numbers as we go
	#
	# initialize line counter
	lineno = 1;
	# for each line in the file ...
	for line in infile:
		# print the line number, then the line
		outfile.write("%6d. " % lineno,);
		outfile.write(line,);
		lineno = lineno + 1;
	# all done!
	infile.close();
	outfile.close();

main();