How to input info into the form to install wordpress automatically?

I have write an onekey installation script in bash,it is tested .

DEBIAN_FRONTEND=noninteractive DEBIAN_PRIORITY=critical mysqlword=“xyzzy” echo mysql-server mysql-server/root_password password $mysqlword | debconf-set-selections echo mysql-server mysql-server/root_password_again password $mysqlword | debconf-set-selections apt-get -q -y install apache2 mysql-server php5 php-pear php5-mysql php5-gd

mysql -u root -p$mysqlword -e"CREATE DATABASE wpdatabase;" mysql -u root -p$mysqlword -e"use wpdatabase;"
mysql -u root -p$mysqlword -e"CREATE USER wpuser@localhost;"
mysql -u root -p$mysqlword -e"SET PASSWORD FOR wpuser@localhost= PASSWORD(‘dbpassword’);" mysql -u root -p$mysqlword -e"GRANT ALL PRIVILEGES ON wpdatabase.* TO wpuser@localhost IDENTIFIED BY ‘dbpassword’;" mysql -u root -p$mysqlword -e"FLUSH PRIVILEGES;"

wget http://wordpress.org/latest.tar.gz tar -xzvf latest.tar.gz cp ~/wordpress/wp-config-sample.php ~/wordpress/wp-config.php

file=“/root/wordpress/wp-config.php” d1=“define(‘DB_NAME’, ‘database_name_here’);” d2=“define(‘DB_USER’, ‘username_here’);” d3=“define(‘DB_PASSWORD’, ‘password_here’);” s1=“define(‘DB_NAME’, ‘wpdatabase’);” s2=“define(‘DB_USER’, ‘wpuser’);” s3=“define(‘DB_PASSWORD’, ‘dbpassword’);” sed -i “s/$d1/$s1/g” $file sed -i “s/$d2/$s2/g” $file sed -i “s/$d3/$s3/g” $file

mv /root/wordpress/* /var/www/

Now when i input my serverip, there is the wordpress installatioin web. The last step remain,you can input info by hand,how can i do that automatically with bash? or with python?