Question

我正在尝试在名为getphone的方法下设置参数role ='r'。在 init 下使用super可以正常工作，但我不知道如何在另一种方法下进行操作

角色是为正在运行的api设置权限级别

此代码有效

PATH = 'home_drive_'
PLATFORM = 'Linux_'
ITEM = '_PC'

class Credential:
    def __init__(self, *, path, platform, role='', **kwargs):
        super().__init__(**kwargs)
        self.role = role
        self.username_file = path + platform + role


class AXL(Credential):
    def __init__(self, *, item, **kwargs):
        super().__init__(role='rw', **kwargs)
        self.item = item

    def getphone(self):
        self.role = 'r'
        return self.username_file + self.item

    def writephone(self):
        self.role = 'rw'
        return self.username_file + self.item

    def statusphone(self):
        self.role = 'rwx'
        return self.username_file + self.item

reg1 = AXL(path=PATH, platform=PLATFORM, item=ITEM)

print(reg1.getphone())
print(reg1.writephone())
print(reg1.statusphone())

在AXL类下，我想将角色='r'移动到getphone方法下

我已经尝试过并且可以正常工作，但是我不明白为什么我需要放置路径和平台。

PATH = 'home_drive_'
PLATFORM = 'Linux_'
ITEM = '_PC'

class Credential:
    def __init__(self, *, path, platform, role='', **kwargs):
        super().__init__(**kwargs)
        self.role = role
        self.username_file = path + platform + role


class AXL(Credential):
    def __init__(self, *, item, **kwargs):
        super().__init__(**kwargs)
        self.item = item

    def getphone(self):
        super().__init__(path=PATH, platform=PLATFORM, role='r')
        return self.username_file + self.item

    def writephone(self):
        super().__init__(path=PATH, platform=PLATFORM, role='rw')
        return self.username_file + self.item

    def statusphone(self):
        super().__init__(path=PATH, platform=PLATFORM, role='rwx')
        return self.username_file + self.item


reg1 = AXL(path=PATH, platform=PLATFORM, item=ITEM)
print(reg1.getphone())
print(reg1.writephone())
print(reg1.statusphone())

可以找到一个沙箱here

Answer 1

没有一个角色与实例相关联；相反，该角色与实例所调用的方法相关联。试试这个。

PATH = 'home_drive_'
PLATFORM = 'Linux_'
ITEM = '_PC'

class Credential:
    def __init__(self, *, path, platform, **kwargs):
        super().__init__(**kwargs)
        self.username_file = path + platform


class AXL(Credential):
    def __init__(self, *, item, **kwargs):
        super().__init__(**kwargs)
        self.item = item

    # "Private" method used to implement the other phone methods
    # You could inline this if you want.
    def _phone(self, role):
        return self.username_file + role + self.item

    def getphone(self):
        return self._phone('r')

    def writephone(self):
        return self._phone('rw')

    def statusphone(self):
        return self._phone('rwx')

reg1 = AXL(path=PATH, platform=PLATFORM, item=ITEM)

print(reg1.getphone())
print(reg1.writephone())
print(reg1.statusphone())

Answer 2

super()将允许您访问父类范围。您可以在python3中以super().method(args)的形式从中访问任何方法，而在python 2中，格式为super(YourClass,self).method(args)。

从OOP角度看，在父方法上为每种方法调用__init__似乎并不正确。您正在其父对象生命周期中对其进行初始化。如果要从父级设置角色，则只需使用self.role = ...。父访问self.role的任何方法都会看到修改。

使用super从方法传递参数

2 个答案: