4.1.3 函数参数电子课件幻灯片

函数参数形参和实参函数定义和形参defsub(a,b):returna-bsub(3,2)函数调用和实参实参的数量必须和形参保持一致位置参数：实参和形参的位置一一对应sub(2,3,1)sub(2,3)位置参数defBirthday():print("Happybirthdaytoyou!")print("Happybirthdaytoyou!")print("Happybirthdaytoyou!")print("Happybirthdaytoyou!")print("张三同学，送你一首歌，祝你学习进步")Birthday()print(“李四老师，送你一首歌，祝您工作顺利！")Birthday()如何在函数中加入位置参数name和hope？位置参数defBirthday(name,hope):print(name+",送你一首歌,祝你"+hope+"!")print("Happybirthdaytoyou!")print("Happybirthdaytoyou!")print("Happybirthdaytoyou!")print("Happybirthdaytoyou!")Birthday("张三同学","学习进步")Birthday("李四老师","工作顺利")关键字参数defBirthday(name,hope):print(name+",送你一首歌,祝你"+hope+"!")print("Happybirthdaytoyou!")print("Happybirthdaytoyou!")print("Happybirthdaytoyou!")print("Happybirthdaytoyou!")Birthday("张三同学","学习进步")Birthday("李四老师","工作顺利")Birthday(hope="工作顺利",name="李四老师")关键字参数可变长参数又称为可变参数deffunc(*param):在参数前加一个*进行标识一个形参，任意多个实参可变长参数defcalc_sum(*scores):value_sum=0forscoreinscores:value_sum=value_sum+scorereturnvalue_sumprint(calc_sum())print(calc_sum(100))print(calc_sum(1，3，5))01009可变关键字参数deffunc(**param):在参数前加**进行标识将关键字参数和可变长参数的功能进行组合可变关键字参数defprint_stu_info(name,stu_id,**other_info):print("Thisisallinfofor",name)print("Name:",name)print("ID:",stu_id)foritem,valueinother_info.items():print(item+':',value)print('-------------------------')print_stu_info("Andy",501)print_stu_info("Jack",503,Age=21)可变关键字参数defprint_stu_info(name,stu_id,**other_info):print("Thisisallinfofor",name)print("Name:",name)print("ID:",stu_id)foritem,valueinother_info.items():print(item+':',valu