python 中 __init__的意义以及作用

class person():

def __init__(self,name,gender,birth,**kw)://可使用 **kw定义关键参数，代表任意参数 ，python中函数的代码块用：php用;

　　self.name=name　　

　　self.gender=gender

　　self.birth=birth

　　for k,w in kw.iteritems():

　　　　setattr(self,k,w)    //python中是按照缩进来判断代码块的从属

def sayhi(self):

　　 print 'my name is',self.name

xiaoming = person('Xiao Ming', 'Male', '1991-1-1',job='student',tel='18089355',stdid='15010')  //php中实例类用new,

xiaohong = person('Xiao Hong', 'Female', '1992-2-2') 

print xiaoming.name

print xiaohong.birth

print xiaoming.job

print xiaoming.tel

print xiaoming.stdid

print xiaoming.sayhi()

# coding:utf-8
class a():
     def __init__(self,name):
         self.name = name
     def get_name(self):
         return self.name
b = a("wang")
print(b.get_name())
 
 
Output:
-----
wang
-----

b = object.__new__(a)
a.__init__(a,"wang")

class fun()
   a = 3

class fun():
    def __init__(self, a):
 
        self.a = a
f = fun(3)
 
print(f.a)
 
Output:
--
3
--