我正在嘗試從子流程中返回值，但是不幸的是這些值無法拾取。因此，我在線程模塊中成功使用了全局變量，但在使用多處理模塊時卻無法檢索在子流程中完成的更新。我希望我想念一些東西。

在給定var dataDV03和的情況下，最后打印的結果始終與初始值相同dataDV04。子進程正在更新這些全局變量，但是這些全局變量在父級中保持不變。

import multiprocessing

# NOT ABLE to get python to return values in passed variables.

ants = ['DV03', 'DV04']

dataDV03 = ['', '']

dataDV04 = {'driver': '', 'status': ''}

def getDV03CclDrivers(lib): # call global variable

global dataDV03

dataDV03[1] = 1

dataDV03[0] = 0

# eval( 'CCL.' + lib + '.' + lib + '( "DV03" )' ) these are unpicklable instantiations

def getDV04CclDrivers(lib, dataDV04): # pass global variable

dataDV04['driver'] = 0 # eval( 'CCL.' + lib + '.' + lib + '( "DV04" )' )

if __name__ == "__main__":

jobs = []

if 'DV03' in ants:

j = multiprocessing.Process(target=getDV03CclDrivers, args=('LORR',))

jobs.append(j)

if 'DV04' in ants:

j = multiprocessing.Process(target=getDV04CclDrivers, args=('LORR', dataDV04))

jobs.append(j)

for j in jobs:

j.start()

for j in jobs:

j.join()

print 'Results:\n'

print 'DV03', dataDV03

print 'DV04', dataDV04

我無法發布我的問題，因此將嘗試編輯原始內容。

這是不可腌制的對象：

In [1]: from CCL import LORR

In [2]: lorr=LORR.LORR('DV20', None)

In [3]: lorr

Out[3]:

這是我使用multiprocessing.Pool將實例返回給父對象時返回的錯誤：

Thread getCcl (('DV20', 'LORR'),)

Process PoolWorker-1:

Traceback (most recent call last):

File "/alma/ACS-10.1/casa/lib/python2.6/multiprocessing/process.py", line 232, in _bootstrap

self.run()

File "/alma/ACS-10.1/casa/lib/python2.6/multiprocessing/process.py", line 88, in run

self._target(*self._args, **self._kwargs)

File "/alma/ACS-10.1/casa/lib/python2.6/multiprocessing/pool.py", line 71, in worker

put((job, i, result))

File "/alma/ACS-10.1/casa/lib/python2.6/multiprocessing/queues.py", line 366, in put

return send(obj)

UnpickleableError: Cannot pickle objects

In [5]: dir(lorr)

Out[5]:

['GET_AMBIENT_TEMPERATURE',

'GET_CAN_ERROR',

'GET_CAN_ERROR_COUNT',

'GET_CHANNEL_NUMBER',

'GET_COUNT_PER_C_OP',

'GET_COUNT_REMAINING_OP',

'GET_DCM_LOCKED',

'GET_EFC_125_MHZ',

'GET_EFC_COMB_LINE_PLL',

'GET_ERROR_CODE_LAST_CAN_ERROR',

'GET_INTERNAL_SLAVE_ERROR_CODE',

'GET_MAGNITUDE_CELSIUS_OP',

'GET_MAJOR_REV_LEVEL',

'GET_MINOR_REV_LEVEL',

'GET_MODULE_CODES_CDAY',

'GET_MODULE_CODES_CMONTH',

'GET_MODULE_CODES_DIG1',

'GET_MODULE_CODES_DIG2',

'GET_MODULE_CODES_DIG4',

'GET_MODULE_CODES_DIG6',

'GET_MODULE_CODES_SERIAL',

'GET_MODULE_CODES_VERSION_MAJOR',

'GET_MODULE_CODES_VERSION_MINOR',

'GET_MODULE_CODES_YEAR',

'GET_NODE_ADDRESS',

'GET_OPTICAL_POWER_OFF',

'GET_OUTPUT_125MHZ_LOCKED',

'GET_OUTPUT_2GHZ_LOCKED',

'GET_PATCH_LEVEL',

'GET_POWER_SUPPLY_12V_NOT_OK',

'GET_POWER_SUPPLY_15V_NOT_OK',

'GET_PROTOCOL_MAJOR_REV_LEVEL',

'GET_PROTOCOL_MINOR_REV_LEVEL',

'GET_PROTOCOL_PATCH_LEVEL',

'GET_PROTOCOL_REV_LEVEL',

'GET_PWR_125_MHZ',

'GET_PWR_25_MHZ',

'GET_PWR_2_GHZ',

'GET_READ_MODULE_CODES',

'GET_RX_OPT_PWR',

'GET_SERIAL_NUMBER',

'GET_SIGN_OP',

'GET_STATUS',

'GET_SW_REV_LEVEL',

'GET_TE_LENGTH',

'GET_TE_LONG_FLAG_SET',

'GET_TE_OFFSET_COUNTER',

'GET_TE_SHORT_FLAG_SET',

'GET_TRANS_NUM',

'GET_VDC_12',

'GET_VDC_15',

'GET_VDC_7',

'GET_VDC_MINUS_7',

'SET_CLEAR_FLAGS',

'SET_FPGA_LOGIC_RESET',

'SET_RESET_AMBSI',

'SET_RESET_DEVICE',

'SET_RESYNC_TE',

'STATUS',

'_HardwareDevice__componentName',

'_HardwareDevice__hw',

'_HardwareDevice__stickyFlag',

'_LORRBase__logger',

'__del__',

'__doc__',

'__init__',

'__module__',

'_devices',

'clearDeviceCommunicationErrorAlarm',

'getControlList',

'getDeviceCommunicationErrorCounter',

'getErrorMessage',

'getHwState',

'getInternalSlaveCanErrorMsg',

'getLastCanErrorMsg',

'getMonitorList',

'hwConfigure',

'hwDiagnostic',

'hwInitialize',

'hwOperational',

'hwSimulation',

'hwStart',

'hwStop',

'inErrorState',

'isMonitoring',

'isSimulated']

In [6]:

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