import urllib
import sys

url = "http://www.baidu.com"
for i in range(int(sys.argv[1])):
    result = urllib.urlopen(url)

Windows环境，Python 2.7 最新版，我开了两个cmd运行这个程序，执行到一半会都出现如下IOError报错。不知道两个一起运行会有冲突吗？新手无法理解，是发生什么样的IO问题呢？

 Traceback (most recent call last):
  File "i13.py", line 4, in <module>
    j12=urllib.urlopen("http://www.baidu.com")
  File "C:\Python27\lib\urllib.py", line 87, in urlopen
    return opener.open(url)
  File "C:\Python27\lib\urllib.py", line 213, in open
    return getattr(self, name)(url)
  File "C:\Python27\lib\urllib.py", line 350, in open_http
    h.endheaders(data)
  File "C:\Python27\lib\httplib.py", line 1049, in endheaders
    self._send_output(message_body)
  File "C:\Python27\lib\httplib.py", line 893, in _send_output
    self.send(msg)
  File "C:\Python27\lib\httplib.py", line 855, in send
    self.connect()
  File "C:\Python27\lib\httplib.py", line 832, in connect
    self.timeout, self.source_address)
  File "C:\Python27\lib\socket.py", line 575, in create_connection
    raise err
IOError: [Errno socket error] [Errno 10060]

我一个运行1000次，一个运行2000次，是不是跟一个窗口运行3000次是一样的？
==========================分割线==========================

 import urllib2
import sys
from multiprocessing.dummy import Pool as ThreadPool

urls = ["http://www.baidu.com"]*int(sys.argv[1])
pool = ThreadPool(int(sys.argv[2]))
results = pool.map(urllib2.urlopen,urls)
pool.close()
pool.join()

运行这个程序test.py 10000 10，执行一半也会发生如下的错误

 Traceback (most recent call last):
  File "test.py", line 7, in <module>
    results = pool.map(urllib2.urlopen,urls)
  File "C:\Python27\lib\multiprocessing\pool.py", line 251, in map
    return self.map_async(func, iterable, chunksize).get()
  File "C:\Python27\lib\multiprocessing\pool.py", line 567, in get
    raise self._value
urllib2.URLError: <urlopen error [Errno 10060] >

这个也是让我很疑惑，不知道从哪里着手好？请大牛指教。