为什么会收到错误消息“没有名为'BaseHTTPServer'的模块”？

Question

我的代码中出现错误。这是代码：

import sys
import BaseHTTPServer
from SimpleHTTPServer import SimpleHTTPRequestHandler


HandlerClass = SimpleHTTPRequestHandler
ServerClass  = BaseHTTPServer.HTTPServer
Protocol     = "HTTP/1.0"

if sys.argv[1:]:
    port = int(sys.argv[1])
else:
    port = 8000
server_address = ('127.0.0.1', port)

HandlerClass.protocol_version = Protocol
httpd = ServerClass(server_address, HandlerClass)

sa = httpd.socket.getsockname()
print("Serving HTTP on", sa[0], "port", sa[1], "...")
httpd.serve_forever()

我的错误是这样的：

Traceback (most recent call last):
  File "main.py", line 2, in <module>
    import BaseHTTPServer
ModuleNotFoundError: No module named 'BaseHTTPServer'

有人可以帮我吗？我想制造一台服务器只是为了了解更多有关它的信息，但随后出现错误。