Why sock.bind is always report 10048 error when in a script with multiprocessing

[Junfeng Hu]

Thanks 
Yes, I had tried this before, so you could find that I comment the line 
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
Here is the results.
D:\Python test>mythread2.py
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "C:\Python27\lib\multiprocessing\forking.py", line 347, in main
    self = load(from_parent)
  File "C:\Python27\lib\pickle.py", line 1378, in load
    return Unpickler(file).load()
  File "C:\Python27\lib\pickle.py", line 858, in load
    dispatch[key](self)
  File "C:\Python27\lib\pickle.py", line 1133, in load_reduce
    value = func(*args)
  File "C:\Python27\lib\multiprocessing\reduction.py", line 167, in rebuild_sock
et
    _sock = fromfd(fd, family, type_, proto)
  File "C:\Python27\lib\multiprocessing\reduction.py", line 156, in fromfd
    s = socket.fromfd(fd, family, type_, proto)
AttributeError: 'module' object has no attribute 'fromfd'