我安装了python 3.9.1，但无法打开jupyter笔记本或jupyterlab

Question

我只是安装，甚至重新安装，但当我试图打开jupuyterlab或p笔记本时，会出现以下错误

 File "c:\users\v\appdata\local\programs\python\python39\lib\runpy.py", line 197, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "c:\users\v\appdata\local\programs\python\python39\lib\runpy.py", line 87, in _run_code
    exec(code, run_globals)
  File "C:\Users\v\AppData\Local\Programs\Python\Python39\Scripts\jupyter-notebook.EXE\__main__.py", line 4, in <module>
  File "c:\users\v\appdata\local\programs\python\python39\lib\site-packages\notebook\notebookapp.py", line 49, in <module>
    from zmq.eventloop import ioloop
  File "c:\users\v\appdata\local\programs\python\python39\lib\site-packages\zmq\__init__.py", line 50, in <module>
    _load_libzmq()
  File "c:\users\v\appdata\local\programs\python\python39\lib\site-packages\zmq\__init__.py", line 28, in _load_libzmq
    from . import libzmq
ImportError: DLL load failed while importing libzmq: The specified module could not be found.

Answer 1

我也有同样的问题。我可以通过卸载pyzmq并用旧版本重新安装来解决这个问题

pip uninstall pyzmq

pip install pyzmq==20.0.0