Mientras analiza los atributos usando__dict__mi@staticmethod no escallable.

Python 2.7.5 (default, Aug 29 2016, 10:12:21)
[GCC 4.8.5 20150623 (Red Hat 4.8.5-4)] on linux2
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>>> from __future__ import (absolute_import, division, print_function)
>>> class C(object):
...   @staticmethod
...   def foo():
...     for name, val in C.__dict__.items():
...       if name[:2] != '__':
...          print(name, callable(val), type(val))
...
>>> C.foo()
foo  False  <type 'staticmethod'>

¿Cómo es esto posible?¿Cómo verificar si un método estático es invocable?

Proporciono a continuación un ejemplo más detallado:

Guióntest.py

from __future__ import (absolute_import, division, print_function)

class C(object):

  @staticmethod
  def foo():
    return 42

  def bar(self):
    print('Is bar() callable?', callable(C.bar))
    print('Is foo() callable?', callable(C.foo))
    for attribute, value in C.__dict__.items():
      if attribute[:2] != '__':
        print(attribute, '\t', callable(value), '\t', type(value))

c = C()
c.bar()

Resultado para python2

> python2.7 test.py
Is bar() callable? True
Is foo() callable? True
bar      True    <type 'function'>
foo      False   <type 'staticmethod'>

Mismo resultado para python3

> python3.4 test.py
Is bar() callable? True
Is foo() callable? True
bar      True    <class 'function'>
foo      False   <class 'staticmethod'>