python property方法,在python类中列出@property装饰的方法
Is it possible to obtain a list of all @property decorated methods in a class? If so how?
Example:
class MyClass(object):
@property
def foo(self):
pass
@property
def bar(self):
pass
How would I obtain ['foo', 'bar'] from this class?
解决方案
Anything decorated with property leaves a dedicated object in your class namespace. Look at the __dict__ of the class, or use the vars() function to obtain the same, and any value that is an instance of the property type is a match:
[name for name, value in vars(MyClass).items() if isinstance(value, property)]
Demo:
>>> class MyClass(object):
... @property
... def foo(self):
... pass
... @property
... def bar(self):
... pass
...
>>> vars(MyClass)
dict_proxy({'__module__': '__main__', 'bar': , '__dict__': , 'foo': , '__weakref__': , '__doc__': None})
>>> [name for name, value in vars(MyClass).items() if isinstance(value, property)]
['bar', 'foo']
Note that this will include anything that used property() directly (which is what a decorator does, really), and that the order of the names is arbitrary (as dictionaries have no set order).