标签：cap test error 调用 file ace color self ade
(1) 普通方法
(2) 绑定方法
(3) 静态方法 (无论类还是对象,都可以调用)
class Plane(): def __init__(self,name): self.name = name #绑定到对象 def fly(self): print ("plane can fly") #普通方法 def capitain(): print ("will have a capitain") #绑定方法（绑定到类） @classmethod def save (cls): print ("will help people") #静态方法（对象，类都可以调用） @staticmethod def attack(): print("some bad people use if for attack") obj = Plane() #普通方法的调用只能使用类来调用，因为没有参数 Palne.capitain()
执行
[root@node10 python]# python3 test.py Traceback (most recent call last): File "test.py", line 18, in <module> obj = Plane() TypeError: __init__() missing 1 required positional argument: ‘name‘
对象使用参数
class Plane(): def __init__(self,name): self.name = name #绑定到对象 def fly(self): print ("plane can fly") #普通方法 def capitain(): print ("will have a capitain") #绑定方法（绑定到类） @classmethod def save (cls): print ("will help people") #静态方法（对象，类都可以调用） @staticmethod def attack(): print("some bad people use if for attack") obj = Plane("benladeng") #普通方法的调用,只能使用类来调用，因为没有参数 Plane.capitain() obj.capitain() #这里会默认传参，不能一一对应
执行
self 系统会默认传递,但是新参没有,不能一一对应
[root@node10 python]# python3 test.py will have a capitain Traceback (most recent call last): File "test.py", line 22, in <module> obj.capitain() TypeError: capitain() takes 0 positional arguments but 1 was given
[root@node10 python]# cat test.py
class Plane():
def __init__(self,name):
self.name = name
#绑定到对象
def fly(self):
print ("plane can fly")
#普通方法
def capitain():
print ("will have a capitain")
#绑定方法（绑定到类）
@classmethod
def save (cls):
print ("will help people")
#静态方法（对象，类都可以调用）
@staticmethod
def attack():
print("some bad people use if for attack")
obj = Plane("benladeng")
#绑定方法的调用
obj.fly()
执行
[root@node10 python]# python3 test.py plane can fly
由于方法fly只是简单的打印，就可以使用对象调用
class Plane():
def __init__(self,name):
self.name = name
#绑定到对象
def fly(self):
print ("plane can fly")
#普通方法
def capitain():
print ("will have a capitain")
#绑定方法（绑定到类）
@classmethod
def save (cls):
print ("will help people")
#静态方法（对象，类都可以调用）
@staticmethod
def attack():
print("some bad people use if for attack")
obj = Plane("benladeng")
#绑定方法的调用
obj.fly()
Plane.fly(111)
执行
[root@node10 python]# python3 test.py
plane can fly
plane can fly
当带有self的参数就会报错（如果函数体里用到了该对象,类名调用的方式不可以.）
class Plane():
def __init__(self,name):
self.name = name
#绑定到对象
def fly(self):
#print ("plane can fly")
print ("plane can fly",self.name)
#普通方法
def capitain():
print ("will have a capitain")
#绑定方法（绑定到类）
@classmethod
def save (cls):
print ("will help people")
#静态方法（对象，类都可以调用）
@staticmethod
def attack():
print("some bad people use if for attack")
obj = Plane("benladeng")
#绑定方法的调用
Plane.fly(111)
执行
[root@node10 python]# python3 test.py
Traceback (most recent call last):
File "test.py", line 22, in <module>
Plane.fly(111)
File "test.py", line 7, in fly
print ("plane can fly",self.name)
AttributeError: ‘int‘ object has no attribute ‘name‘
class Plane(): def __init__(self,name): self.name = name #绑定到对象 def fly(self): #print ("plane can fly") print ("plane can fly",self.name) #普通方法 def capitain(): print ("will have a capitain") #绑定方法（绑定到类） @classmethod def save (cls): print ("will help people") #静态方法（对象，类都可以调用） @staticmethod def attack(): print("some bad people use if for attack") obj = Plane("benladeng") #绑定到类方法的调用 Plane.save()
执行
[root@node10 python]# python3 test.py will help people
打印出这个类
class Plane(): def __init__(self,name): self.name = name #绑定到对象 def fly(self): #print ("plane can fly") print ("plane can fly",self.name) #普通方法 def capitain(): print ("will have a capitain") #绑定方法（绑定到类） @classmethod def save (cls): print (cls) print ("will help people") #静态方法（对象，类都可以调用） @staticmethod def attack(): print("some bad people use if for attack") obj = Plane("benladeng") #绑定到类方法的调用 Plane.save()
执行
[root@node10 python]# python3 test.py <class ‘__main__.Plane‘> will help people
对象可以调用类中的属性和方法，但是类不能调用对象中的属性和方法
class Plane(): def __init__(self,name): self.name = name #绑定到对象 def fly(self): #print ("plane can fly") print ("plane can fly",self.name) #普通方法 def capitain(): print ("will have a capitain") #绑定方法（绑定到类） @classmethod def save (cls): cls.name print (cls) print ("will help people") #静态方法（对象，类都可以调用） @staticmethod def attack(): print("some bad people use if for attack") obj = Plane("benladeng") #绑定到类方法的调用 Plane.save()
执行
[root@node10 python]# python3 test.py Traceback (most recent call last): File "test.py", line 24, in <module> Plane.save() File "test.py", line 14, in save cls.name AttributeError: type object ‘Plane‘ has no attribute ‘name‘
class Plane(): material = "合金" def __init__(self,name): self.name = name #绑定到对象 def fly(self): #print ("plane can fly") print ("plane can fly",self.name) #普通方法 def capitain(): print ("will have a capitain") #绑定方法（绑定到类） @classmethod def save (cls): print (cls.material) print ("will help people") #静态方法（对象，类都可以调用） @staticmethod def attack(): print("some bad people use if for attack") obj = Plane("benladeng") #绑定到类方法的调用 Plane.save()
执行
[root@node10 python]# python3 test.py 合金 will help people
先把obj所归属的类找出来,然后把该类当成参数进行传递.
class Plane(): material = "合金" def __init__(self,name): self.name = name #绑定到对象 def fly(self): #print ("plane can fly") print ("plane can fly",self.name) #普通方法 def capitain(): print ("will have a capitain") #绑定方法（绑定到类） @classmethod def save (cls): print (cls.material) print ("will help people") #静态方法（对象，类都可以调用） @staticmethod def attack(): print("some bad people use if for attack") obj = Plane("benladeng") #绑定到类方法的调用 Plane.save() obj.save()
执行
[root@node10 python]# python3 test.py 合金 will help people 合金 will help people
class Plane(): material = "合金" def __init__(self,name): self.name = name #绑定到对象 def fly(self): #print ("plane can fly") print ("plane can fly",self.name) #普通方法 def capitain(): print ("will have a capitain") #绑定方法（绑定到类） @classmethod def save (cls): print (cls.material) print ("will help people") #静态方法（对象，类都可以调用） @staticmethod def attack(): print("some bad people use if for attack") obj = Plane("benladeng") #静态方法的调用 obj.attack() Plane.attack()
执行
[root@node10 python]# python3 test.py some bad people use if for attack some bad people use if for attack
调用成功
标签：cap test error 调用 file ace color self ade
原文地址：https://www.cnblogs.com/zyxnhr/p/12333529.html
