__all__ for figure_factory and io (for sphinx) (plotly#1803)

Author: emmanuelle

Diff for: packages/python/plotly/plotly/figure_factory/__init__.py

@@ -30,3 +30,22 @@
 
 if optional_imports.get_module("pandas") is not None:
     from plotly.figure_factory._county_choropleth import create_choropleth
+
+__all__ = [
+    "create_2d_density",
+    "create_annotated_heatmap",
+    "create_bullet",
+    "create_candlestick",
+    "create_dendrogram",
+    "create_distplot",
+    "create_facet_grid",
+    "create_gantt",
+    "create_ohlc",
+    "create_quiver",
+    "create_scatterplotmatrix",
+    "create_streamline",
+    "create_table",
+    "create_ternary_contour",
+    "create_trisurf",
+    "create_violin",
+]

Diff for: packages/python/plotly/plotly/io/__init__.py

@@ -10,3 +10,19 @@
 from ._renderers import renderers, show
 
 from . import base_renderers
+
+__all__ = [
+    "to_image",
+    "write_image",
+    "to_json",
+    "from_json",
+    "read_json",
+    "write_json",
+    "templates",
+    "to_templated",
+    "to_html",
+    "write_html",
+    "renderers",
+    "show",
+    "base_renderers",
+]