Fill in default labels from pandas.DataFrame columns
Fill in default labels from pandas.DataFrame columns

The pandas DataFrame is becoming a standard data structure
for working with statistical data.

This allows for slightly less typing than
`triangle.corner(df, labels=df.columns)`.

allisony/triangle.py,sedonaprice/corner.py,lisaleemcb/triangle.py,dfm/corner.py,philrosenfield/triangle.py