try Mock()

docs/conf.py

@@ -28,9 +28,7 @@
               'sphinx.ext.intersphinx', 'sphinx.ext.todo', 
               'sphinx.ext.coverage', 'sphinx.ext.pngmath', 
               'sphinx.ext.ifconfig', 'sphinx.ext.viewcode',
-              'matplotlib.sphinxext.plot_directive',
-              'matplotlib.sphinxext.mathmpl',
-              'matplotlib.sphinxext.only_directives']
+              'matplotlib.sphinxext.plot_directive']
 
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['templates']
@@ -223,3 +221,23 @@
 
 # Example configuration for intersphinx: refer to the Python standard library.
 intersphinx_mapping = {'http://docs.python.org/': None}
+
+class Mock(object):
+    def __init__(self, *args, **kwargs):
+        pass
+
+    def __call__(self, *args, **kwargs):
+        return Mock()
+
+    @classmethod
+    def __getattr__(cls, name):
+        if name in ('__file__', '__path__'):
+            return '/dev/null'
+        elif name[0] == name[0].upper():
+            return type(name, (), {})
+        else:
+            return Mock()
+
+MOCK_MODULES = ['numpy', 'matplotlib', 'matplotlib.pyplot']
+for mod_name in MOCK_MODULES:
+    sys.modules[mod_name] = Mock()