$> sudo apt-get install python-pyscript
Reading package lists... Done
Building dependency tree
Reading state information... Done
python-pyscript is already the newest version (0.6.1-4).
0 upgraded, 0 newly installed, 0 to remove and 151 not upgraded.

$> pip install pyscript
Requirement already satisfied: pyscript in /usr/lib/python2.7/dist-packages

$> python shellcode_encoder.py
Traceback (most recent call last):
  File "shellcode_encoder.py", line 10, in <module>
    import pyscrypt
ImportError: No module named pyscrypt

&> more shellcode_encoder.py
import argparse
from Crypto.Hash import MD5
from Crypto.Cipher import AES
import pyscrypt
from base64 import b64encode
from os import urandom
from string import Template
import os
...

$> uname -a
Linux [REDACTED] 4.7.0-1-amd64 #1 SMP Debian 4.7.8-1 (2016-10-19) x86_64 GNU/Linux