Question

当我执行这个程序时，我得到一个空列表：

我希望它能够创建对象列表并将对象追加到obj_list_addresses列表中。

然后当我调用get_good_addresses（）时，我希望它返回列表并在列表中的每个对象上执行代码，只有列表返回空[]几乎就像被覆盖一样。

我对python很新，并且知道我遗漏了一些重要内容。

主：

from address import Address
from address_processor import AddressProcessor
addresses=[]
addresses = open('test.txt').read().splitlines()
proccess_addresses = AddressProcessor(addresses)
proccess_addresses.create_addresses_obj()
proccess_addresses.get_good_addresses()

AddressProcessor类：

import multiprocessing
from address import Address

class AddressProcessor(object):
    """AddressProcessor will process a txt file with addresses"""

    def __init__(self, addresses):

        self.addresses = addresses
        self.return_addresses = []
        self.obj_list_addresses = []

    def create_addresses_obj(self):
        jobs = []
        for address in self.addresses:
            process = multiprocessing.Process(target=self.worker, args=(address,))
            jobs.append(process)
            process.start()
        for job in jobs:
            job.join()
        print('created objects for addresses in text file')

    def worker(self, address):

        obj = Address(address)
        self.obj_list_addresses.append(obj)

    def get_good_addresses(self):

        print self.obj_list_addresses

地址类：

from string import replace
from pprint import pprint

class Address(object):

"""
This is address class send it an address it will look up
the addy and return json string of the parcels that matched the address 
then update status if it was the only one returned its good if not its bad
"""

def __init__(self, address):

    self.address = address
    self.status = ''
    self.json_string = ''

    self.set_json_string()

def get_address(self):
    return self.address

def set_json_string(self):

    r = requests.get('urlbasegoeshere'+replace(self.address," ","+")+'&pagesize=40&page=1')
    self.json_string = r.json
    self.set_status()

def set_status(self):

    if len(self.json_string) == 1:
        self.status = 1

    elif len(self.json_string)!=1:
        self.status = 0

def get_status(self):
    return self.status

Answer 1

为什么使用多处理＆＃39;创建地址对象？不同的进程不共享内存，即他们不共享对象。这不是一个python的东西，它与你使用的任何语言都是一样的。

替换这三行

        process = multiprocessing.Process(target=self.worker, args=(address,))
        jobs.append(process)
        process.start()

与

        self.worker(address)

Python丢失了对象列表

1 个答案: