小编col*_*nta的帖子

免责声明这只是元编程的练习,没有实际意义.

我分配__getitem__和__getattr__函数对象的方法,但没有效果...

def foo():
  print "foo!"

foo.__getitem__ = lambda name: name
foo.__getattr__ = lambda name: name
foo.baz = 'baz'

我们可以为函数指定属性的完整性检查:

>>> foo.baz
'baz'

整齐."神奇的吸气者"怎么样？

>>> foo.bar
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'function' object has no attribute 'bar'

>>> foo['foo']
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: 'function' object is not subscriptable

>>> getattr(foo, 'bar')
Traceback (most recent call last):
  File "<stdin>", …