我嘗試使用以下命令將 conda 更新到最新版本：(base) PS C:\> conda update -n base -c defaults condaPreparing transaction: doneVerifying transaction: doneExecuting transaction: - DEBUG menuinst_win32:__init__(199): Menu: name: 'Anaconda${PY_VER} ${PLATFORM}', prefix: 'C:\Users\username\AppData\Local\Continuum\anaconda3', env_name: 'None', mode: 'user', used_mode: 'user'DEBUG menuinst_win32:create(323): Shortcut cmd is C:\Users\username\AppData\Local\Continuum\anaconda3\python.exe, args are ['C:\\Users\\username\\AppData\\Local\\Continuum\\anaconda3\\cwp.py', 'C:\\Users\\username\\AppData\\Local\\Continuum\\anaconda3', 'C:\\Users\\username\\AppData\\Local\\Continuum\\anaconda3\\python.exe', 'C:\\Users\\username\\AppData\\Local\\Continuum\\anaconda3\\Scripts\\jupyter-notebook-script.py', '"%USERPROFILE%/"']doneRolling back transaction: doneAssertionError()()AssertionError()AssertionError()在此之后，基本的 anaconda python 似乎被破壞了，與通常的 conda 命令有關的任何事情似乎都返回相同的 No module named 'conda_package_handling' 錯誤。我該如何解決這個問題，請指教。例如：(base) PS C:\> conda listError processing line 1 of C:\Users\username\AppData\Local\Continuum\anaconda3\lib\site-packages\matplotlib-3.1.0-py3.7-nspkg.pth:  Traceback (most recent call last):    File "C:\Users\username\AppData\Local\Continuum\anaconda3\lib\site.py", line 168, in addpackage      exec(line)    File "<string>", line 1, in <module>    File "<frozen importlib._bootstrap>", line 580, in module_from_spec  AttributeError: 'NoneType' object has no attribute 'loader'Remainder of file ignoredTraceback (most recent call last):  File "C:\Users\username\AppData\Local\Continuum\anaconda3\lib\site-packages\conda\exceptions.py", line 1062, in __call__    return func(*args, **kwargs)  File "C:\Users\username\AppData\Local\Continuum\anaconda3\lib\site-packages\conda\cli\main.py", line 84, in _main    exit_code = do_call(args, p)  File "C:\Users\username\AppData\Local\Continuum\anaconda3\lib\site-packages\conda\cli\conda_argparse.py", line 80, in do_call