plotly 4.4.0 on Python PyPI

[4.4.0] - 2019-12-10

Extended the plotly.express functional API with 7 new functions: px.pie,
px.sunburst, px.treemap, px.funnel, and px.funnel_area (#1909) px.density_mapbox and
px.choropleth_mapbox #1937.
plotly.express mapbox functions in plotly.express have new arguments center and mapbox_style #1937.
plotly.express polar plots (scatter_polar, line_polar, bar_polar) now
have a range_theta keyword argument for representing only an angular
section #1969.
All continuous colorscales now accept a _r suffix that reverses their direction #1933
Docstrings of plotly.py are now doctested #1921.

Updated Plotly.js to version 1.51.2. See the
plotly.js CHANGELOG
for more information
The tutorials of the plotly.py documentation are
now in the main plotly.py Github repository. Contributions in order to improve or extend the documentation are very welcome!
plotly.express generated plots no longer have a default height of 600 pixels, instead they inherit the default height of regular figures #1990. To restore the old behavior, set px.defaults.height=600 once per session, or set the height keyword arguement to any px.function() to 600.

Fixed a plotly.express input bug when using data frame indices#1934
Fixed how to display facet labels with plotly express #1966
Fixed a bug to use correctly the zmin/zmax parameter in px.imshow for single-channel images #1981
Clipped docstring width for better display in Jupyterlab #1939. Thank you @joelostblom!
Fixed a bug in the case of external orca server #1915 thank you @dev-dsp!