Python memoize示例

示例#1

def exercise_memoize():
    diagnostic = []

    def f(x):
        """ Documentation for function f """
        diagnostic.append('+')
        return x + 1

    mf = oop.memoize(f)
    assert mf(0) == 1
    assert diagnostic == ['+']
    assert mf(0) == 1
    assert diagnostic == ['+']
    assert mf(1) == 2
    assert diagnostic == ['+'] * 2
    assert mf(0) == 1
    assert diagnostic == ['+'] * 2
    assert mf(1) == 2
    assert diagnostic == ['+'] * 2
    try:
        mf(x=1)
    except TypeError as e:
        pass
    else:
        raise Exception_expected
    assert mf.__doc__ == """ Documentation for function f """

示例#2

文件： tst_object_oriented_patterns.py 项目： hainm/cctbx_project

def exercise_memoize():
  diagnostic = []
  def f(x):
    """ Documentation for function f """
    diagnostic.append('+')
    return x+1

  mf = oop.memoize(f)
  assert mf(0) == 1
  assert diagnostic == ['+']
  assert mf(0) == 1
  assert diagnostic == ['+']
  assert mf(1) == 2
  assert diagnostic == ['+']*2
  assert mf(0) == 1
  assert diagnostic == ['+']*2
  assert mf(1) == 2
  assert diagnostic == ['+']*2
  try:
    mf(x=1)
  except TypeError, e:
    pass