import os
on_rtd = os.environ.get('READTHEDOCS', None) == 'True'
if on_rtd:
    html_theme = 'default'
else:
    html_theme = 'nature'

import os
on_rtd = os.environ.get('READTHEDOCS', None) == 'True'
if on_rtd:
    html_theme = 'default'
else:
    html_theme = 'nature'
project == "Python"

Read The Docs conf changes