run a python file online code example

Example 1: online python compiler

Use this site
https://repl.it/languages/python3

Example 2: run python online

# Here's the best online Python IDE: https://repl.it
# It allows for many languages and not just python!

Example 3: online python compiler

This is the best online compler for python which I've used.
Probably you will find it on the top of your search resluts too.

https://www.programiz.com/python-programming/online-compiler/

Example 4: python code runner online

print "Did you know that " + str(n) + " squared is " + str(n*n) + "?"