How to clear screen in Python Interactive Shell

Most of the time when I deal with interactive mode, there are a lot of lines. , this is a simply solution to solve this problem.
There are 2 methods
1. Short Key: Under Linux/UNIX system (on x86 at least) you can use the CTRL+L
2. Writing a code:

import os
if os.name == "posix":
# Unix/Linux/MacOS/BSD/etc
os.system("clear")
elif os.name in ("nt", "dos", "ce"):
# DOS/Windows
os.system("CLS")

 
Note that for writing a code and you know your os.
You can just "import os" then "os.system([command to clear screen for that os])".

p.s. os.system() is very useful to make python work with other command in command line mode ex. os.system("python") to call python shell in python shell.