我是Python新手,不明白爲什麼我無法做到這一點。 當我嘗試更改來自父對象的Packet.ItemData中的值時,它不起作用。請參閱代碼中的「不工作」註釋。Python - 無法更改類中項目的值
import json
from copy import deepcopy
class Event():
__slots__= 'itemName'
def __init__(self, itemName):
self.itemName = itemName
def encode(self):
obj = {}
obj['itemName'] = str(self.itemName)
return json.dumps(obj)
def decode(self, json_Str):
obj = json.loads(json_Str)
self.itemName = obj['itemName']
class Packet():
__slots__= 'pID', 'itemData'
def __init__(self, pID, itemData):
self.pID = pID
self.itemData = itemData
def encode(self):
obj = {}
obj['pID'] = int(self.pID)
obj['itemData'] = str(self.itemData.encode())
return json.dumps(obj)
def decode(self, json_Str):
obj = json.loads(json_Str)
self.pID = obj['pID']
self.itemData = Event(0,'')
defaultEvent = Event('Dflt')
defaultPacket = Packet(1, defaultEvent)
event2 = Event('NoName')
print 'event : ', event2.encode()
packet3 = deepcopy(defaultPacket)
packet3.ItemData = event2; #direct assign doesn't work
packet3.ItemData = deepcopy(event2); #deep copy doesn't work
packet3.ItemData.itemName = 'Hello' #event this doesn't work
print 'packet : ', packet3.encode()
我想包裝數據,所以我得到正是我期望從JSON編碼和解碼時。
謝謝,我討厭追逐敏感,所以用pascal。我試圖使用插槽來防止額外的數據在那裏。 – runfastman