1.3.1 readthedocs sphinx compat fix

docs/conf.py

@@ -12,9 +12,9 @@
 # All configuration values have a default; values that are commented out
 # serve to show the default.
 
-#import sys
-#import os
-#import shlex
+import sys
+import os
+import shlex
 
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
@@ -112,6 +112,14 @@
 # a list of builtin themes.
 html_theme = 'alabaster'
 
+# 1.3.1 sphinx READTHEDOCS build compat
+# SEE:
+# https://github.com/shabda/pysaml2/commit/d55bfeebe
+on_rtd = os.environ.get('READTHEDOCS', None) == 'True'
+
+if on_rtd:  # only import and set the theme if we're building docs locally
+    html_theme = 'sphinx_rtd_theme'
+
 # Theme options are theme-specific and customize the look and feel of a theme
 # further.  For a list of options available for each theme, see the
 # documentation.