Add requirements.txt for readthedocs.org

doc/conf.py

@@ -20,6 +20,7 @@ import time
 # add these directories to sys.path here. If the directory is relative to the
 # documentation root, use os.path.abspath to make it absolute, like shown here.
 sys.path.insert(0, os.path.abspath('../'))
+sys.path.insert(1, os.path.abspath('../test-packages'))
 
 # -- General configuration -----------------------------------------------------
 

doc/requirements.txt

@@ -0,0 +1,3 @@
+# WARNING: those requirements are used only for readthedocs.org
+# they SHOULD NOT be used under normal conditions; use system package manager
+lxml

test-packages/dbus.py

@@ -0,0 +1,2 @@
+class DBusException(Exception):
+    pass