Fix empty docstring (#1192)

* Fix empty docstring * Rm whitespace * Add #1192
arviz-devs · May 18, 2020 · 065a741 · 065a741
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -36,6 +36,7 @@
 * Fixed bug in `plot_posterior` with rcParam "plot.matplotlib.show" = True (#1151)
 * Set `fill_last` argument of `plot_kde` to False by default (#1158)
 * plot_ppc animation: improve docs and error handling (#1162)
+* Fix import error when wrapped function docstring is empty (#1192)
 
 ### Deprecation
 * `hpd` function deprecated in favor of `hdi`. `credible_interval` argument replaced by `hdi_prob`throughout with exception of `plot_loo_pit` (#1176)

diff --git a/arviz/plots/backends/__init__.py b/arviz/plots/backends/__init__.py
@@ -192,6 +192,8 @@ def _copy_docstring(lib, function):
     except ImportError:
         doc = "Failed to import function {} from {}".format(function, lib)
 
+    if not isinstance(doc, str):
+        doc = ""
     return doc