Fix docs generating on RTD

docs/conf.py

@@ -15,26 +15,34 @@
 import sys
 import os
 import shlex
+import mock
 
 # 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
 # documentation root, use os.path.abspath to make it absolute, like shown here.
 sys.path.insert(0, os.path.abspath('..'))
 # sys.path.insert(0, os.path.abspath('../recordlinkage'))
 
-autodoc_mock_imports = [
-  'numpy', 
-  'scipy', 
-  'scipy.sparse',   
-  'pandas', 
-  'pandas.types.inference', 
-  'sklearn', 
-  'sklearn.feature_extraction',
-  'sklearn.feature_extraction.text', 
-  'sklearn.utils.validation',
-  'sklearn.preprocessing'
+# why does autodoc_mock_imports fail on rtd
+MOCK_MODULES = [
+    'numpy',
+    'scipy',
+    'scipy.sparse',
+    'pandas',
+    'pandas.types',
+    'pandas.types.inference',
+    'sklearn',
+    'sklearn.feature_extraction',
+    'sklearn.feature_extraction.text',
+    'sklearn.utils',
+    'sklearn.utils.validation',
+    'sklearn.preprocessing'
 ]
 
+
+for mod_name in MOCK_MODULES:
+    sys.modules[mod_name] = mock.Mock()
+
 import recordlinkage
 
 # -- General configuration ------------------------------------------------