passing the password for sudo permission in subprocess Python

Question

For example, take a simple program

from subprocess import check_output
t = check_output(['ls', '-a'])
print t

now there are many commands which needs to be run with sudo permission. for given example

from subprocess import check_output
t = check_output(['sudo', 'ls', '-a'])
print t

but it asks for password in my terminal. instead I want to input the password programatically, even bypass this, if possible.