PYTHON for 循环通过 dict_keys 和 UDP 发送

Question

作为一个对 Python 几乎一无所知的 Pascal 程序员，我正在尝试使用 pyicloud https://github.com/picklepete/pyicloud/ 编写一个小而简单的 Python 脚本，该脚本每隔某某秒通过 UDP 套接字重定向所有设备的位置数据 json输出如底部所示。 python 脚本应该是这样的：

from pyicloud import PyiCloudService
api = []
api.append(PyiCloudService('JAppleseedAppleIdEmailHere', 'password'))
api.append(PyiCloudService('SomeOtherAppleIdEmailHere', 'psadfsdfassword')) 
# more accounts here if desired...
#PeerIp = '10.0.0.5'
PeerIp = '127.0.0.1'
PeerPort = 2028

import time, threading, socket, json, struct

ContinueDevicesPostionUpdate = True

def DevicesPostionUpdate():
    if ContinueDevicesPostionUpdate:
        # print(time.ctime())
        threading.Timer(10, DevicesPostionUpdate).start()

        # Code for generating json from api.devices and api.devices[].location()
        # This is where i get all sort of errors in my shotgun programming
        MESSAGE = bytes(smsg, 'utf-8')
        sock.sendto(MESSAGE, (PeerIp, PeerPort))

sock = socket.socket(socket.AF_INET,        # Internet
                     socket.SOCK_DGRAM)     # UDP
DevicesPostionUpdate()

例如：

for k, v in api:
    for key, value in api[k].devices.items():
        print (api[k].devices[key].location())
#results in:
Exception in thread Thread-4:
Traceback (most recent call last):
  File "C:\Python33\lib\threading.py", line 901, in _bootstrap_inner
    self.run()
  File "C:\Python33\lib\threading.py", line 1142, in run
    self.function(*self.args, **self.kwargs)
  File "test.py", line 17, in DevicesPostionUpdate
    for k, v in api:
TypeError: 'PyiCloudService' object is not iterable

或者

MESSAGE = json.dumps([dict(device=device, location=device.location()) for a in api for device in a.devices.values()]).encode()
#results in:
Traceback (most recent call last):
  File "test.py", line 23, in <module>
    DevicesPostionUpdate()
  File "test.py", line 17, in DevicesPostionUpdate
    MESSAGE = json.dumps([dict(device=device, location=device.location()) for a in api for device in a.devices.values()]).encode()
  File "C:\Python33\lib\json\__init__.py", line 236, in dumps
    return _default_encoder.encode(obj)
  File "C:\Python33\lib\json\encoder.py", line 191, in encode
    chunks = self.iterencode(o, _one_shot=True)
  File "C:\Python33\lib\json\encoder.py", line 249, in iterencode
    return _iterencode(o, 0)
  File "C:\Python33\lib\json\encoder.py", line 173, in default
    raise TypeError(repr(o) + " is not JSON serializable")
TypeError: <AppleDevice(iPhone 4S: Johnny Appleseed's iPhone)> is not JSON serializable

期望的输出应该是这样的：

{
    {
        u'i9vbKRGIcLYqJnXMd1b257kUWnoyEBcEh6yM+IfmiMLh7BmOpALS+w==': <AppleDevice(iPhone 4S: Johnny Appleseed's iPhone)>,
        {   
        u'timeStamp': 1357753796553, 
        u'locationFinished': True, 
        u'longitude': -0.14189, 
        u'positionType': u'GPS', 
        u'locationType': None, 
        u'latitude': 51.501364, 
        u'isOld': False, 
        u'horizontalAccuracy': 5.0
        }
    }
    ,
    {
    u'reGYDh9XwqNWTGIhNBuEwP1ds0F/Lg5t/fxNbI4V939hhXawByErk+HYVNSUzmWV': <AppleDevice(MacBook Air 11": Johnny Appleseed's MacBook Air)>
        {   
        u'timeStamp': 1357753796553, 
        u'locationFinished': True, 
        u'longitude': -0.14189, 
        u'positionType': u'GPS', 
        u'locationType': None, 
        u'latitude': 51.501364, 
        u'isOld': False, 
        u'horizontalAccuracy': 5.0
        }
    }
    ,
    {
    u'reGYDh9XwqNWTGIhNBuEwP1ds0F/Lg5t/fxNbI4V939hhXawByErk+HYVNSUzmWV': <AppleDevice(iPhone 4S: Some Other's iPhone)>
        {   
        u'timeStamp': 1357753796553, 
        u'locationFinished': True, 
        u'longitude': -0.14189, 
        u'positionType': u'GPS', 
        u'locationType': None, 
        u'latitude': 51.501364, 
        u'isOld': False, 
        u'horizontalAccuracy': 5.0
        }
    }
}

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Answer 1

您似乎正在使用 python 3。用于 dicts 的 .iteritems() 方法不再存在，它已被 .items() 取代。尝试更换它，看看是否有帮助。

Answer 2

没有什么比提出问题并在几个小时后自己得到答案更有趣的了。感谢您的帮助Totem

你是个天才J.F. Sebastian！

from pyicloud import PyiCloudService
api = []
api.append(PyiCloudService('JAppleseedAppleIdEmailHere', 'password'))
api.append(PyiCloudService('SomeOtherAppleIdEmailHere', 'psadfsdfassword'))
PeerIp = '127.0.0.1'
PeerPort = 2028
ThreadRunCount = -1
InfoEveryRunTime = 10
import time, threading, socket, json
def update_device_position():
    smsg = '{\n'
    global ThreadRunCount
    ThreadRunCount += 1
    MESSAGE = json.dumps([dict(device=str(device), location=device.location()) for a in api for device in a.devices.values()]).encode()
    DevCount = 0
    for a in api:
        for key, value in a.devices.items():
            DevCount += 1
    sock.sendto(MESSAGE, (PeerIp, PeerPort))
    tmst = time.strftime('%H:%M:%S')
    if (ThreadRunCount % InfoEveryRunTime) == 0:
        ThreadRunCount = 1
        print('[' + tmst+ '] JSON of ' + str(len(MESSAGE))  +' bytes from ' + str(DevCount) + ' devices sent to ' + PeerIp + ':' + str(PeerPort)) 
                     # Internet      # UDP
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
stopped = threading.Event()
while not stopped.wait(10):
    update_device_position()