patch_socket_setblocking.py

def setblocking():
    setblocking_func = socket.socket.setblocking

    def wrapper(self, flag):
        if flag:
            # prohibit timeout reset
            timeout = socket.getdefaulttimeout()
            if timeout:
                self.settimeout(timeout)
            else:
                setblocking_func(self, flag)
        else:
            setblocking_func(self, flag)

    wrapper.__doc__ = setblocking_func.__doc__
    wrapper.__name__ = setblocking_func.__name__
    return wrapper


socket.socket.setblocking = setblocking()