[Python] How to open a url with urllib via proxy ?

Problem
When I try to open a URL via urllib, but I get this error message:

  File "C:\Users\albert\AppData\Local\Programs\Python\Python36-32\lib\http\client.py", line 936, in connect
    (self.host,self.port), self.timeout, self.source_address)
  File "C:\Users\albert\AppData\Local\Programs\Python\Python36-32\lib\socket.py", line 722, in create_connection
    raise err
  File "C:\Users\albert\AppData\Local\Programs\Python\Python36-32\lib\socket.py", line 713, in create_connection
    sock.connect(sa)
TimeoutError: [WinError 10060] 連線嘗試失敗，因為連線對象有一段時間並未正確回應，或是連線建立失敗，因為連線的主機無法回應。

Here has the code snippet:

import urllib.request, json
from test.json.row import row

with urllib.request.urlopen("http://od.moi.gov.tw/api/v1/rest/datastore/A01010000C-000628-023") as url:
    data = json.loads(url.read().decode())
    print(data)
    dataList = []
    count = 1
    for value in data['result']['records']:
        if(count > 1):
            no = value['No']              # 編號
            address = value['Address']    # 地點位置
            deptNm = value['DeptNm']      # 管轄警察局
            branchNm = value['BranchNm']  # 分局
            dataList.append(row(no, address, deptNm, branchNm)) 
            print('no={}, address={}, deptNm={}, branchNm={}'.format(no, address, deptNm, branchNm))
        count += count 

How-to
This error result from failing to connect to this URL. I need to configure proxy in my network environment as I connect. Hence, the updated code will look like:

import urllib.request, json
from test.json.row import row

import os
os.environ['http_proxy'] = 'http://proxy.cht.com.tw:8080'

with urllib.request.urlopen("http://od.moi.gov.tw/api/v1/rest/datastore/A01010000C-000628-023") as url:
    data = json.loads(url.read().decode())
    print(data)
    dataList = []
    count = 1
    for value in data['result']['records']:
        if(count > 1):
            no = value['No']              # 編號
            address = value['Address']    # 地點位置
            deptNm = value['DeptNm']      # 管轄警察局
            branchNm = value['BranchNm']  # 分局
            dataList.append(row(no, address, deptNm, branchNm)) 
            print('no={}, address={}, deptNm={}, branchNm={}'.format(no, address, deptNm, branchNm))
        count += count