Let's say: there is a data frame:
country Edition sports Athletes Medal Firstname
Germany 1990 Aquatics HAJOS, Alfred gold Alfred
Germany 1990 Aquatics HIRSCHMANN, Otto silver Otto
Germany 1990 Aquatics DRIVAS, Dimitrios silver Dimitrios
US 2008 Athletics MALOKINIS, Ioannis gold Ioannis
US 2008 Athletics HAJOS, Alfred silver Alfred
US 2009 Athletics CHASAPIS, Spiridon gold Spiridon
France 2010 Athletics CHOROPHAS, Efstathios gold Efstathios
France 2010 Athletics CHOROPHAS, Efstathios gold Efstathios
France 2010 golf HAJOS, Alfred Bronze Alfred
France 2011 golf ANDREOU, Joannis silver Joannis
Spain 2011 golf BURKE, Thomas gold Thomas
can anyone tell me how to assign Firstname of Athletes to new column 'Firstname'
in most efficient way? after adding new column df['Firstname']
?