解決python多線程報(bào)錯(cuò):AttributeError: Can't pickle local object問(wèn)題
報(bào)錯(cuò)信息:
Traceback (most recent call last):File “D:/flaskProject/test.py”, line 35, in testpool.apply(self.out, args=(i,))File “Python37-32libmultiprocessingpool.py', line 261, in applyreturn self.apply_async(func, args, kwds).get()File 'libmultiprocessingpool.py”, line 657, in getraise self._valueFile “Python37-32libmultiprocessingpool.py', line 431, in _handle_tasksput(task)File 'Python37-32libmultiprocessingconnection.py”, line 206, in sendself._send_bytes(_ForkingPickler.dumps(obj))File “*Python37-32libmultiprocessingreduction.py”, line 51, in dumpscls(buf, protocol).dump(obj)TypeError: can’t pickle _thread._local objects
原類的構(gòu)造函數(shù):
class threadtest:def __init__(self, ipList, user, password): self.ipList = ipList self.httpAuth = HTTPDigestAuth(user, password) returndef out(self, i): url = 'http://' + i + '/name' response = requests.get(url, self.httpAuth) print(response.text) returndef test(self): pool = Pool(processes=2) for i in self.ipList: pool.apply(self.out, args=(i,)) pool.close() pool.join() return
if name == ‘main’:ipList = [‘192.168.2.1’, ‘192.168.2.2’, ‘192.168.2.3’, ‘192.168.2.4’, ‘192.168.2.5’, ]a = threadtest(ipList, ‘a(chǎn)dmin’, ‘a(chǎn)dmin’)a.test()
原因:
在class中對(duì)屬性進(jìn)行初始化使用了其它類返回的句柄進(jìn)行初始化導(dǎo)致,HTTPDigestAuth的返回值不能進(jìn)行序列化,也就是不能作為cls(buf, protocol).dump(obj)的參數(shù)進(jìn)行序列化。
將self.httpAuth = HTTPDigestAuth(httpUser, httpPassword)修改為:
self.httpUserself.httpPassword
并將函數(shù)HTTPDigestAuth放到類的方法中
修改后:
class threadtest:def __init__(self, ipList, user, password): self.ipList = ipList self.user = user self.password = password returndef out(self, i): url = 'http://' + i + '/name' response = requests.get(url, HTTPDigestAuth(self.user, self.password)) print(response.text) returndef test(self): pool = Pool(processes=2) for i in self.ipList: pool.apply(self.out, args=(i,)) pool.close() pool.join() return
if name == ‘main’:ipList = [‘192.168.2.1’, ‘192.168.2.2’, ‘192.168.2.3’, ‘192.168.2.4’, ‘192.168.2.5’, ]a = threadtest(ipList, ‘a(chǎn)dmin’, ‘a(chǎn)dmin’)a.test()
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