</h1>
<div class="clear"></div>
<div class="postBody">
一、super的作用
1.如果子類(Puple)繼承父類(Person)不做初始化，那麼會自動繼承父類(Person)屬性name。
2.如果子類(Puple_Init)繼承父類(Person)做了初始化，且不調用super初始化父類構造函數，那麼子類(Puple_Init)不會自動繼承父類的屬性(name)。
3.如果子類(Puple_super)繼承父類(Person)做了初始化，且調用了super初始化了父類的構造函數，那麼子類(Puple_Super)也會繼承父類的(name)屬性。
class Father(): def __init__(self,name = 'father'): self.name = name
class SonA(Father):
pass
class SonB(Father):
def init(self,age ):
self.age = age
class SonC(Father):
def init(self,name,age ):
self.age </span>=<span style="color: #000000;"> age
self.name </span>=<span style="color: #000000;"> name
super(SonC, self).</span><span style="color: #800080;">__init__</span><span style="color: #000000;">(name)
sona = SonA()
print(sona.name)
sonb = SonB(10)
print(sonb.name)
sonc = SonC(‘sonc’,10)
print(sonc.name)
father
Traceback (most recent call last):
File "C:/Users/wiggin/PycharmProjects/AI/1簡單的神經網絡實現過程/test.py", line 24, in <module>
print(sonb.name)
AttributeError: 'SonB' object has no attribute 'name'
sonc
2.繼承中super的調用順序
繼承中super的調用順序是與MRO-C3的類方法查找順序一樣的
class A: def __init__(self): print('A')
class B(A):
def init(self):
print(‘B’)
super().init()
class C(A):
def init(self):
print(‘C’)
super().init()
class D(A):
def init(self):
print(‘D’)
super().init()
class E(B, C):
def init(self):
print(‘E’)
super().init()
class F(C, D):
def init(self):
print(‘F’)
super().init()
class G(E, F):
def init(self):
print(‘G’)
super().init()
g = G()
G
E
B
F
C
D
A
<div id="blog_post_info">
<div class="clear"></div>
<div id="post_next_prev">
<a href="https://www.cnblogs.com/wigginess/p/13048901.html" class="p_n_p_prefix">« </a> 上一篇： <a href="https://www.cnblogs.com/wigginess/p/13048901.html" title="發佈於 2020-06-05 11:56">tensorflow2.0學習筆記第二章第四節</a>
<br>
<a href="https://www.cnblogs.com/wigginess/p/13062696.html" class="p_n_p_prefix">» </a> 下一篇： <a href="https://www.cnblogs.com/wigginess/p/13062696.html" title="發佈於 2020-06-07 22:33">1.keras-構建基本簡單網絡實現線性迴歸</a>