python - SocketServer没有模块要导入

我想在我的mac上创建一个SocketServer。
不过，这些包裹似乎有些问题。当我尝试这个发现here的采样代码时，它会引发attributeRor。

import SocketServer

class MyTCPHandler(SocketServer.BaseRequestHandler):
    """
    The RequestHandler class for our server.

    It is instantiated once per connection to the server, and must
    override the handle() method to implement communication to the
    client.
    """

    def handle(self):
        # self.request is the TCP socket connected to the client
        self.data = self.request.recv(1024).strip()
        print "{} wrote:".format(self.client_address[0])
        print self.data
        # just send back the same data, but upper-cased
        self.request.sendall(self.data.upper())

if __name__ == "__main__":
    HOST, PORT = "localhost", 9999

    # Create the server, binding to localhost on port 9999
    server = SocketServer.TCPServer((HOST, PORT), MyTCPHandler)

    # Activate the server; this will keep running until you
    # interrupt the program with Ctrl-C
    server.serve_forever()

错误：

Traceback (most recent call last):
  File "/Users/ddl449/Projects/visualization/SocketServer.py", line 1, in <module>
    import SocketServer
  File "/Users/ddl449/Projects/visualization/SocketServer.py", line 3, in <module>
    class MyTCPHandler(SocketServer.BaseRequestHandler):
AttributeError: 'module' object has no attribute 'BaseRequestHandler'

我不知道这是否有必要，我在Mac上运行。我的python版本是：

2.7.5 (v2.7.5:ab05e7dd2788, May 13 2013, 13:18:45)
[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)]

最佳答案

似乎您在python路径中的某个地方有SocketServer.py。
使用以下命令检查：

python -c "import SocketServer; print(SocketServer.__file__)"

重命名该文件将解决您的问题。
更新
重命名文件/Users/ddl449/Projects/visualization/SocketServer.py。如果存在/Users/ddl449/Projects/visualization/SocketServer.pyc，请删除该文件。