Use the size property to retrieve the number of elements in a teradataml DataFrame.
Example
>>> df = DataFrame('sales')
>>> df
Feb Jan Mar Apr datetime
accounts
Alpha Co 210.0 200 215 250 04/01/2017
Red Inc 200.0 150 140 None 04/01/2017
Orange Inc 210.0 None None 250 04/01/2017
Jones LLC 200.0 150 140 180 04/01/2017
Yellow Inc 90.0 None None None 04/01/2017
Blue Inc 90.0 50 95 101 04/01/2017
>>> df.size 36