如果需求是基于某些实例属性动态生成属性，那么下面的代码可能会有用:

import random  

class Foo:
    def __init__(self, prop_names: List[str], should_property_be_zero: bool = False) -> None:
        self.prop_names = prop_names
        self.should_property_be_zero = should_property_be_zero
        
    def create_properties(self):
        for name in self.prop_names:
            setattr(self.__class__, name, property(fget=lambda self: 0 if self.should_property_be_zero else random.randint(1, 100)))

需要注意的重要一点是使用setattr(self。__class__进行名称,…),而不是setattr(自我、名称…)

使用的例子:

In [261]: prop_names = ['a', 'b']

In [262]: ff = Foo(prop_names=prop_names, should_property_be_zero=False)

In [263]: ff.create_properties()

In [264]: ff.a
Out[264]: 10

In [265]: ff.b
Out[265]: 37

In [266]: ft = Foo(prop_names=prop_names, should_property_be_zero=True)

In [267]: ft.create_properties()

In [268]: ft.a
Out[268]: 0

In [269]: ft.b
Out[269]: 0

设置属性将引发AttributeError:不能按预期设置属性:

In [270]: ff.a = 5
---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
<ipython-input-270-5f9cad5b617d> in <module>
----> 1 ff.a = 5

AttributeError: can't set attribute

In [271]: ft.a = 5
---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
<ipython-input-271-65e7b8e25b67> in <module>
----> 1 ft.a = 5

AttributeError: can't set attribute

你可以使用下面的代码来使用字典对象更新类属性:

class ExampleClass():
    def __init__(self, argv):
        for key, val in argv.items():
            self.__dict__[key] = val

if __name__ == '__main__':
    argv = {'intro': 'Hello World!'}
    instance = ExampleClass(argv)
    print instance.intro

扩展了kjfletch的想法

# This is my humble contribution, extending the idea to serialize
# data from and to tuples, comparison operations and allowing functions
# as default values.

def Struct(*args, **kwargs):
    FUNCTIONS = (types.BuiltinFunctionType, types.BuiltinMethodType, \
                 types.FunctionType, types.MethodType)
    def init(self, *iargs, **ikwargs):
        """Asume that unamed args are placed in the same order than
        astuple() yields (currently alphabetic order)
        """
        kw = list(self.__slots__)

        # set the unnamed args
        for i in range(len(iargs)):
            k = kw.pop(0)
            setattr(self, k, iargs[i])

        # set the named args
        for k, v in ikwargs.items():
            setattr(self, k, v)
            kw.remove(k)

        # set default values
        for k in kw:
            v = kwargs[k]
            if isinstance(v, FUNCTIONS):
                v = v()
            setattr(self, k, v)

    def astuple(self):
        return tuple([getattr(self, k) for k in self.__slots__])

    def __str__(self):
        data = ['{}={}'.format(k, getattr(self, k)) for k in self.__slots__]
        return '<{}: {}>'.format(self.__class__.__name__, ', '.join(data))

    def __repr__(self):
        return str(self)

    def __eq__(self, other):
        return self.astuple() == other.astuple()

    name = kwargs.pop("__name__", "MyStruct")
    slots = list(args)
    slots.extend(kwargs.keys())
    # set non-specific default values to None
    kwargs.update(dict((k, None) for k in args))

    return type(name, (object,), {
        '__init__': init,
        '__slots__': tuple(slots),
        'astuple': astuple,
        '__str__': __str__,
        '__repr__': __repr__,
        '__eq__': __eq__,
    })


Event = Struct('user', 'cmd', \
               'arg1', 'arg2',  \
               date=time.time, \
               __name__='Event')

aa = Event('pepe', 77)
print(aa)
raw = aa.astuple()

bb = Event(*raw)
print(bb)

if aa == bb:
    print('Are equals')

cc = Event(cmd='foo')
print(cc)

输出:

<Event: user=pepe, cmd=77, arg1=None, arg2=None, date=1550051398.3651814>
<Event: user=pepe, cmd=77, arg1=None, arg2=None, date=1550051398.3651814>
Are equals
<Event: user=None, cmd=foo, arg1=None, arg2=None, date=1550051403.7938335>

这里有一个解决方案:

允许将属性名指定为字符串，因此它们可以来自一些外部数据源，而不是全部列在程序中。 在定义类时添加属性，而不是每次创建对象时添加属性。

定义类之后，你只需动态地向它添加一个属性:

setattr(SomeClass, 'propertyName', property(getter, setter))

下面是一个完整的例子，用Python 3测试过:

#!/usr/bin/env python3

class Foo():
  pass

def get_x(self):
  return 3

def set_x(self, value):
  print("set x on %s to %d" % (self, value))

setattr(Foo, 'x', property(get_x, set_x))

foo1 = Foo()
foo1.x = 12
print(foo1.x)

虽然给出了很多答案，但我没有找到一个让我满意的。我找到了自己的解决方案，使属性适用于动态情况。来源回答原来的问题:

#!/usr/local/bin/python3

INITS = { 'ab': 100, 'cd': 200 }

class DP(dict):
  def __init__(self):
    super().__init__()
    for k,v in INITS.items():
        self[k] = v 

def _dict_set(dp, key, value):
  dp[key] = value

for item in INITS.keys():
  setattr(
    DP,
    item,
    lambda key: property(
      lambda self: self[key], lambda self, value: _dict_set(self, key, value)
    )(item)
  )

a = DP()
print(a)  # {'ab': 100, 'cd': 200}
a.ab = 'ab100'
a.cd = False
print(a.ab, a.cd) # ab100 False

不能在运行时向实例添加新的属性()，因为属性是数据描述符。相反，你必须动态地创建一个新类，或者重载__getattribute__以处理实例上的数据描述符。