实例化过程:
class luffy_stu:
def __init__(self,name,age,sex):
self.name = name
self.age = age
self.sex = sex
def eat(self):
pass
if __name__=="__main__":
stu1 = luffy_stu('bao',21,'male')
#实例化过程:
#1. 是先产生一个stu1对象,
#2. luffy_stu.__init__('stu1','bao',21,'male')再将stu1对象传入__init__构造函数中实例化对象.