常用的方法定义
方法在OOP中会经常用到,减少代码的冗余,作为一门面向对象的语言,Python自然也有自己的方法定义。那么怎样在Python中定义一个方法呢,很简洁的方法:define functionname()
调用的时候直接使用这个方法名就可以了,functionname(),就可以了,当然在方法定义的时候一样可以定义它的输入参数,例如:define functionname(yourname,myname),在调用的时候传入参数即可。
__author__="Alex" __date__ ="$2011-2-17 10:39:27$" if __name__ == "__main__": print "Hello"; #define a function def welcome(): print("Welcome to my python class") # define a function by arg def welcome_bylevel( name, level ): print ( 'Welcome ' + name + ' to the program =)' ) print ( 'We will try some things out.' ) if level == 'pro': print ( 'Be patient, I am beginner.' ) print ('') welcome() welcome_bylevel( 'Alex', 'beginner' ) welcome_bylevel( 'Viki', 'pro' )
Console Output:
Hello Welcome to my python class Welcome Alex to the program =) We will try some things out. Welcome Viki to the program =) We will try some things out. Be patient, I am beginner.
动态调用
在Python代码中方法的参数如果不确定为多少个的时候,可以用*arg来表示,例如:
__author__="Alex" __date__ ="$2011-2-17 10:39:27$" if __name__ == "__main__": print "Hello"; #define a function def welcome(name,level="beginner",*skill): print("Hello, "+name) if level!="beginner": print("We will show something out"); else: print("I am beginner of python") if len(skill)>0: for i in skill: print('you are good at:'+i) welcome("Viki") welcome('Alex',"pro","Python","Linux")
控制台输出:
Hello Hello, Viki I am beginner of python Hello, Alex We will show something out you are good at:Python you are good at:Linux
