v3.9.0

[3.9.0] - 2019-04-19

Updated

• Updated Plotly.js to version 1.47.4. See the
  plotly.js CHANGELOG
  for more information.

Added

• Added "magic underscore" support for specifying nested figure properties
  (#1534)
• Added select_traces, for_each_trace, and update_traces figure
  methods for accessing and updating traces by subplot location and trace
  properties
  (#1534)
• Added select_*, for_each_*, and update_* figure methods for
  accessing and updating subplot objects (xaxis, scene, polar, etc)
  (#1548)
• Added support for Dash Design Kit style color specifications
  (#1541). Thanks to
  @wbrgss for this contribution!
• Added support for the plotly_unselect plotly.js event in a new
  on_unselect trace method
  (#1542). Thanks to
  @denphi for this contribution!

Changed

• Changed the default colorscale to be plasma for the plotly, plotly_white, and
  plotly_dark templates for plotly.py version 4
  (#1274,
  #1549)
• Reordered the default colorway for the plotly, plotly_white, and
  plotly_dark templates for plotly.py version 4
  (#1549)

Fixed

• Fixed package listing in setup.py
  (#1543). Thanks to
  @jakevdp for this contribution!
• Fixed built-in templates so that heatmap colorscales can be overridden
  without specifying autocolorscale=False
  (#1454,
  #1549)
• Fix UnboundLocalError error in the presence of a missing or corrupt
  ~/.plotly/.config file
  (#1551)
• Fixed error when combining sankey traces with cartesian subplots
  (#1527,
  plotly/plotly.js#3802)