How do I pipe output from one python script as input to another python script?

Question

For example:

A script1.py gets an infix expression from the user and converts it to a postfix expression and returns it or prints it to stdout

script2.py gets a

Answer 1

For example if you have nginx running and script1.py:

import os

os.system("ps aux")

and script2.py

import os

os.system("grep nginx")

Then running:

python script1.py | script2.py

will be same as

ps aux | grep nginx