クラスからメソッド取得

reflection examples.py

class A:
  def aaa(self):
    ''' instance method'''
    print 'hello world'
  
  @classmethod
  def bbb():
    '''class method'''
    print 'this is pen'

a = A()

aaa = getattr(a, 'aaa')

aaa() # hello world

aaa2 = getattr(A, 'aaa')

aaa2() # !ERROR
aaa2(a) # hello world

bbb = getattr(b, 'bbb')

bbb() # this is pen
bbb(b) # this is pen

bbb2 = getattr(B, 'bbb')

bbb2() # this is pen