[WIP] Debug R doc build failure

ci/travis-36-doc.yaml

@@ -1,14 +1,14 @@
 name: pandas
 channels:
   - defaults
-  - conda-forge
+  # - conda-forge
   - r
 dependencies:
   - beautifulsoup4
   - bottleneck
   - cython
   - fastparquet
-  - feather-format
+  # - feather-format
   - html5lib
   - ipykernel
   - ipython
@@ -17,7 +17,7 @@ dependencies:
   - matplotlib
   - nbconvert
   - nbformat
-  - nbsphinx
+  # - nbsphinx
   - notebook
   - numexpr
   - numpy=1.13*

doc/source/conf.py

@@ -72,7 +72,7 @@
               'sphinx.ext.mathjax',
               'sphinx.ext.ifconfig',
               'sphinx.ext.linkcode',
-              'nbsphinx',
+            #   'nbsphinx',
               ]
 
 exclude_patterns = ['**.ipynb_checkpoints']

pandas/__init__.py

@@ -58,6 +58,8 @@
 from pandas.util._tester import test
 import pandas.testing
 
+import rpy2.rinterface as rinterface
+
 # extension module deprecations
 from pandas.util._depr_module import _DeprecatedModule