#!/usr/bin/python

import sys
print(sys.version_info)
print “successful start”
print “ “

listAl = [ a, b, c, d, e, f, g]
listNu = [ 1, 2, 3, 4, 5, 6]
print listAl
print listNu

python

python3

Python 2.7.10 (default, Feb  7 2017, 00:08:15)
[GCC 4.2.1 Compatible Apple LLVM 8.0.0 (clang-800.0.34)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> listTest.py

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
NameError: name 'listTest' is not defined
>>>

/usr/local/bin/pip
/usr/bin/python

ls Desktop