sloot.object 1.4.0

基本用法

>>> from sloot.object import dictobj
>>> d = dictobj({'a': 'a', 'b': 'b'}, c='c')
>>> print(d)
dictobj({'a': 'a', 'b': 'b', 'c': 'c'})
>>> d.a
'a'
>>> d['a']
'a'
>>> d.a = 3
>>> d.a
3
>>> d['a'] = 42
>>> d.a
42
>>> print(d)
dictobj({'a': 42, 'c': 'c', 'b': 'b'})
>>> print(dict(d))
{'a': 42, 'c': 'c', 'b': 'b'}

setattr在继承对象中的行为

>>> class T(dictobj):
...   classvar = 'classvar'
...   def f(self):
...     return 'f'
...   @property
...   def prop(self):
...     return getattr(self, '_prop', 'prop')
...   @prop.setter
...   def prop(self, value):
...     self._prop = value
...

• 方法和类属性不会被覆盖并转到dict:

  >>> t = T({'classvar': 1, 'f': 2, 'prop': 3})
  >>> t.classvar  # access the class attribute
  'classvar'
  >>> t['classvar']  # access the dict entry
  1
  >>> t.classvar = 5  # we don't overwrite class attributes, this goes to dict
  >>> t.classvar  # this is the class attribute
  'classvar'
  >>> t['classvar']
  5
  >>> t.f  # access the class method
  <bound method T.f of T({'classvar': 1, 'f': 2, 'prop': 3})>
  >>> t['f']  # access the dict entry
  2
  >>> t.f = 4  # we don't overwrite the method, this goes to the dict
  >>> t.f
  <bound method T.f of T({'classvar': 1, 'f': 2, 'prop': 3})>
  >>> t['f']
  4
  

• 使用getter和setter属性：

  >>> t.prop  # get the property
  'prop'
  >>> t['prop']  # get the dict entry
  3
  >>> t.prop = 'newprop'  # use property setter
  >>> t.prop
  'newprop'
  >>> t['prop']
  3
  

• 否则将更新dict:

  >>> t.a = 42
  >>> t['a']
  42
  >>> t.a
  42