上游充通大 ParisTech SHANGHAI JIAO TONG UNIVERSITY INSTITUT DES SCIENCES ET TECHNOLOGIES PARIS INSTITUTE OF TECHNOLOGY Functions,Informally The generic function sing def sing(person): happy ( happy ( print"Happy birthday,dear",person " happy ( This function uses a parameter named person. A paramater is a variable that is initialized when the function is called. 1414 Functions, Informally • The generic function sing def sing(person): happy() happy() print"Happy birthday, dear", person + ".“ happy() • This function uses a parameter named person. A paramater is a variable that is initialized when the function is called