plotly 3.3.0 on Python PyPI

[3.3.0] - 2018-09-28

Updated Plotly.js to version 1.41.3. Select highlights included below, see
the plotly.js CHANGELOG
for more information.
Do not create or check permissions on the ~/.plotly configuration directory until a configuration write operation is performed (#1195). This change avoids some concurrency problems associated with running many instances of
plotly.py simultaneously (#1068).

Enable selection by clicking on points via new layout attribute clickmode and flag 'select'
(#2944)
Added stacked area charts via new attributes stackgroup and stackgaps in scatter traces
(#2960)
Added barpolar trace type - which replace and augment area traces
(#2954)
Added polar.hole layout parameter to punch hole at the middle of polar
subplot offsetting the start of the radial range
(#2977, #2996)
Figures may now be easily converted to and from JSON using the new
to_json, from_json, read_json, and write_json functions in the
plotly.io package
(#1188)
Figures and graph objects now support deepcopy and pickle operations
(#1191)
The location of the "~/.plotly" settings directory may now be customized
using the PLOTLY_DIR environment variable
(#1195)
Added optional scaleratio argument to the create_quiver figure factory.
When specified, the axes are restricted to this ratio and the quiver arrows
are computed to have consistent lengths across angles.
(#1197)

Replace use of pkg_resources.resource_string with pkgutil.get_data to
improve compatibility with cx_Freeze
(#1201)
An exception is no longer raised when an optional dependency raises an
exception on import. The exception is logged and plotly.py continues as if
the dependency were not installed
(#1192)
Fixed invalid dendrogram axis labels when the points being clustered contain
duplicate values
(#1186)
Added missing LICENSE.txt file to PyPI source distribution
(#765)

For use with JupyterLab, the following versions of the following packages
must be installed:

Python Packages
- plotly==3.3.0
- ipywidgets>=7.2
- notebook>=5.3
- jupyterlab==0.34
JupyterLab Extensions
- plotlywidget@0.4.0
- @jupyter-widgets/jupyterlab-manager@0.37
- @jupyterlab/plotly-extension@0.17