>>> class Test():
... REQUESTS_PER_SECOND = 1
...
直接訪問:
>>> Test.REQUESTS_PER_SECOND
1
重新賦值,instance 繼承新值:
>>> Test.REQUESTS_PER_SECOND = 2
>>> t = Test()
>>> t.REQUESTS_PER_SECOND
2
再次重新賦值,instance 再次繼承新值:
>>> Test.REQUESTS_PER_SECOND = 3
>>> t.REQUESTS_PER_SECOND
3
instance 賦值,對 static class variable 無影響:
>>> t.REQUESTS_PER_SECOND = 4
>>> Test.REQUESTS_PER_SECOND
3
已賦值過的 instance 不再受 class 的影響:
>>> Test.REQUESTS_PER_SECOND = 5
>>> t.REQUESTS_PER_SECOND
4