Python dictionary password generator (like correct horse battery staple)

chbp.py

#!/usr/bin/python
import random;
import sys;


Words = [Word.rstrip( '\n' ) for Word in open( "/usr/share/dict/american-english") ];

Length = raw_input( "How many words should Your xkcd like password have?  " ); 

try:
	Length = int( Length );
except:
	print( "Please enter a valid integer number!" );
	Length = 0;

Password = "";
for i in range( Length ):
	Password += ( '\x1b[3' + str( 1 + i % 7 ) + ';1m' );
	Password += ( Words[random.randrange(0, len( Words ) ) ] );

print( Password );