python - malformed header from script index.py Bad header -

i want run python code in apache2(ubuntu 14.04) server. have followed these steps , getting error:

step 1:

configuration 1: have created directory , file under

/var/www/cgi-bin 

configuration 2 : have edited /etc/apache2/sites-available/000-default.conf

alias /cgi-bin /var/www/cgi-bin <directory "/var/www/cgi-bin"> options indexes followsymlinks execcgi addhandler cgi-script .cgi .py allow </directory>  <directory /var/www/cgi-bin> options </directory> 

step 2:

and python script is: index.py

#!/usr/bin/env python import cgi; import cgitb;cgitb.enable()  print "content-type: text/plain\n"  print "<b>hello python</b>" 

step 3:

when ran through chrome browser using: url : http://localhost/cgi-bin/index.py

step 4:

i getting error in error-log

malformed header script 'index.py': bad header: hello python 

you should end header \r\n, must print out yet \r\n signal body coming.

(in other words, it's interpreting body header because headers never terminated)