def _find_player_id(self, row):
return row('<STR_LIT>').attr('<STR_LIT>')<EOL>
Find the player's ID.

Find the player's ID as embedded in the 'data-append-csv' attribute,
such as 'altuvjo01' for Jose Altuve.

Parameters
----------
row : PyQuery object
    A PyQuery object representing a single row in a boxscore table for
    a single player.

Returns
-------
str
    Returns a ``string`` of the player's ID, such as 'altuvjo01' for
    Jose Altuve.