通过Jenkins触发python脚本时，URL连接失败-代理错误

Question

正在运行python脚本，该脚本通过jenkins发出url请求，从而引发这些错误。

TimeoutError: [WinError 10060] A connection attempt failed because the 
connected party did not properly respond after a period of time, or 
established connection failed because connected host has failed to respond

还有

urllib.error.URLError: <urlopen error [WinError 10060] A connection attempt 
failed because the connected party did not properly respond after a period of 
time, or established connection failed because connected host has failed to 
respond>
Build step 'Windows PowerShell' marked build as failure
Finished: FAILURE

正在运行的脚本是：

import urllib.request

url_string = "http://www.google.com/"
reader = urllib.request.urlopen(url_string )

for data in reader:
    print(data)

此脚本可以正常执行IDLE。

请帮助解决此问题。