在 Python2.7 中安裝 OCPP 時出錯

Question

我正在嘗試使用以下命令在 Python 2.7 中安裝 OCPP 並收到如下所示的錯誤。 請幫忙解決問題

C:\Python27>python -m pip install ocpp
Collecting ocpp
  Downloading https://files.pythonhosted.org/packages/36/f8/f3222edf8cf0f1a7373c9d5b0be0974959b3cf302906f0c59fe8bf4071f7/ocpp-0.1.1.tar.gz
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "c:\users\vijaya~1\appdata\local\temp\pip-build-yaigdj\ocpp\setup.py", line 6, in <module>
        with open(path.join(here, 'README.md'), encoding='utf-8') as f:
    TypeError: 'encoding' is an invalid keyword argument for this function

    ----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in c:\users\vijaya~1\appdata\local\temp\pip-build-yaigdj\ocpp\
You are using pip version 9.0.1, however version 20.2.4 is available.
You should consider upgrading via the 'python -m pip install --upgrade pip' command.

我安裝了python 3.8並重新安裝了OCPP。 之后，我嘗試模擬以下鏈接https://pypi.org/project/ocpp/ 中給出的 PyPi OCPP 的中央系統和充電點。 中央系統代碼運行沒有任何錯誤。 但是在編譯充電點代碼時，我收到以下錯誤

Python 3.8.3 (tags/v3.8.3:6f8c832, May 13 2020, 22:37:02) [MSC v.1924 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license()" for more information.
>>> 
====================== RESTART: C:/Python38/ocppserver.py ======================
INFO:root:WebSocket Server Started

====================== RESTART: C:\Python38\chargepoint.py =====================
Traceback (most recent call last):
  File "C:\Python38\chargepoint.py", line 39, in <module>
    asyncio.run(main())
  File "C:\Python38\lib\asyncio\runners.py", line 43, in run
    return loop.run_until_complete(main)
  File "C:\Python38\lib\asyncio\base_events.py", line 616, in run_until_complete
    return future.result()
  File "C:\Python38\chargepoint.py", line 28, in main
    async with websockets.connect(
  File "C:\Python38\lib\site-packages\websockets\client.py", line 517, in __aenter__
    return await self
  File "C:\Python38\lib\site-packages\websockets\client.py", line 535, in __await_impl__
    transport, protocol = await self._create_connection()
  File "C:\Python38\lib\asyncio\base_events.py", line 1030, in create_connection
    raise exceptions[0]
  File "C:\Python38\lib\asyncio\base_events.py", line 1010, in create_connection
    sock = await self._connect_sock(
  File "C:\Python38\lib\asyncio\base_events.py", line 924, in _connect_sock
    await self.sock_connect(sock, address)
  File "C:\Python38\lib\asyncio\proactor_events.py", line 702, in sock_connect
    return await self._proactor.connect(sock, address)
  File "C:\Python38\lib\asyncio\windows_events.py", line 808, in _poll
    value = callback(transferred, key, ov)
  File "C:\Python38\lib\asyncio\windows_events.py", line 595, in finish_connect
    ov.getresult()
ConnectionRefusedError: [WinError 1225] The remote computer refused the network connection
>>> 

Answer 1

[PyPI]: ocpp (目前是v0.8.1 ) 只支持Python 3 。 但是，同樣的事情也適用於v0.1.1 （^第一個OCPP版本）。

因此，繼續進行的唯一方法是安裝（並開始使用） Python 3 ，並放棄Python 2(.7) （它從萬能的 2020 年開始就已經死了（ [Python]：PEP 373 - Python 2.7 發布時間表）） .

當然，將OCPP代碼移植到Python 2是（痛苦的）替代方案，但我完全反對它。