PX "wide-form" mode like Seaborn

[nicolaskruchten]

Seaborn has a nice mode whereby in something like px.line(), if neither x nor y are specified (see also #2332!) it treats the data frame as "wide" rather than "long"/"tidy" and sets x=index, y=melted value and color=melted variable. We could do some variation on this as well.

[nicolaskruchten]

See also plotly/plotly_express#141, plotly/plotly_express#126, plotly/plotly_express#37

[emmanuelle]

Interesting! Indeed switching all the time between wide and tidy is a pain.