Simple Python code failing with the 'secrettoken' variable

PigPen_v0.0000001.py

# Pasting the secret access token works at `pnutpy.api.add_authorization_token(secrettoken)`.  HOWEVER I want to remove my access token from this code to ***allow sharing.***

import pnutpy
import console

tokenfile = open("secrettoken.txt", "r")
secrettoken = tokenfile.read()
# print secrettoken
pnutpy.api.add_authorization_token(secrettoken)

# Create a post
posttext = raw_input("posttext: ")
post, meta = pnutpy.api.create_post(data={'text':posttext})

I know a little Python 3, can't figure out much of Python 2. I believe the code is valid Python 2 but it fails to work thus:

1. Fails to run with Python 3.5 interpreter.
2. Substituting the text of the access token works but using the variable name fails.