1. Create a violin plot, e.g.:
   https://plot.ly/python/violin-plot/#multiple-violins

Result:
Grid information is printed to stdout and can't be turned off:

This is the format of your plot grid:
[ (1,1) x1,y1 ]  [ (1,2) x2,y1 ]  [ (1,3) x3,y1 ]  [ (1,4) x4,y1 ]  [ (1,5) x5,y1 ]

Expected:
No grid information to print, or a setting to control verbosity.

Possible fix:

• Pass print=False explicitly to make_subplots
• Make print=False the default parameter to make_subplots
• Switch to logging rather than print statements so output can easily be controlled/redirected.

Here are the violin plot calls where print=True, though True is also the default parameter"
https://github.com/plotly/plotly.py/blob/master/plotly/tools.py#L2730
https://github.com/plotly/plotly.py/blob/master/plotly/tools.py#L2798
https://github.com/plotly/plotly.py/blob/master/plotly/tools.py#L2899