Python enum - 在字符串转换时获取 enum 的值
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enum - getting value of enum on string conversion
提问by Vaibhav Mishra
I have following enum defined
我定义了以下枚举
from enum import Enum
class D(Enum):
x = 1
y = 2
print(D.x)
now the printed value is
现在打印的值是
D.x
instead I wanted the enum's value to be print
相反，我希望枚举的值被打印
1
Hhat can be done to achieve this functionality?
可以做些什么来实现这个功能？
采纳答案by Martijn Pieters
You are printing the enum object. Use the .valueattribute if you wanted just to print that:
您正在打印枚举对象。.value如果您只想打印该属性，请使用该属性：
print(D.x.value)
See the Programmatic access to enumeration members and their attributessection:
If you have an enum member and need its name or value:
>>> >>> member = Color.red >>> member.name 'red' >>> member.value 1
如果您有枚举成员并需要其名称或值：
>>> >>> member = Color.red >>> member.name 'red' >>> member.value 1
You could add a __str__method to your enum, if all you wanted was to provide a custom string representation:
__str__如果您只想提供自定义字符串表示形式，则可以向枚举添加一个方法：
class D(Enum):
def __str__(self):
return str(self.value)
x = 1
y = 2
Demo:
演示：
>>> from enum import Enum
>>> class D(Enum):
... def __str__(self):
... return str(self.value)
... x = 1
... y = 2
...
>>> D.x
<D.x: 1>
>>> print(D.x)
1
回答by Vaibhav Mishra
I implemented access using the following
我使用以下方法实现了访问
class D(Enum):
x = 1
y = 2
def __str__(self):
return '%s' % self.value
now I can just do
现在我可以做
print(D.x)to get 1as result.
print(D.x)得到1结果。
You can also use self.namein case you wanted to print xinstead of 1.
您还可以使用self.name的情况下，你想打印x代替1。
