'jupyter' 在 Windows 10 中未被识别为内部或外部命令、可运行的程序或批处理文件

Question

When I try to access jupyter via cmd it gives me the error line in the title. I'm using python 3.8.5 and installed jupyter via pip using pip install jupyter command and it showed me the following message in the cmd line

>pip install jupyter
Requirement already satisfied: jupyter in c:\users\this 
pc\appdata\local\programs\python\python38\lib\site-packages (1.0.0)
Requirement already satisfied: jupyter-console in c:\users\this 
pc\appdata\local\programs\python\python38\lib\site-packages (from jupyter) (6.1.0)
Requirement already satisfied: notebook in c:\users\this 
pc\appdata\local\programs\python\python38\lib\site-packages (from jupyter) (6.1.3)
Requirement already satisfied: qtconsole in c:\users\this 
pc\appdata\local\programs\python\python38\lib\site-packages (from jupyter) (4.7.6)
Requirement already satisfied: ipywidgets in c:\users\this 
pc\appdata\local\programs\python\python38\lib\site-packages (from jupyter) (7.5.1)
Requirement already satisfied: ipykernel in c:\users\this pc\appdata\roaming\python\python38\site- 
packages (from jupyter) (5.3.4)
Requirement already satisfied: nbconvert in c:\users\this 
pc\appdata\local\programs\python\python38\lib\site-packages (from jupyter) (5.6.1)
Requirement already satisfied: pygments in c:\users\this pc\appdata\roaming\python\python38\site- 
packages (from jupyter-console->jupyter) (2.6.1)
Requirement already satisfied: prompt-toolkit!=3.0.0,!=3.0.1,<3.1.0,>=2.0.0 in c:\users\this 
pc\appdata\roaming\python\python38\site-packages (from jupyter-console->jupyter) (3.0.6)
Requirement already satisfied: jupyter-client in c:\users\this 
pc\appdata\roaming\python\python38\site-packages (from jupyter-console->jupyter) (6.1.6)
Requirement already satisfied: ipython in c:\users\this pc\appdata\roaming\python\python38\site- 
packages (from jupyter-console->jupyter) (7.17.0)
Requirement already satisfied: Send2Trash in c:\users\this 
pc\appdata\local\programs\python\python38\lib\site-packages (from notebook->jupyter) (1.5.0)
Requirement already satisfied: nbformat in c:\users\this 
pc\appdata\local\programs\python\python38\lib\site-packages (from notebook->jupyter) (5.0.7)
Requirement already satisfied: pyzmq>=17 in c:\users\this pc\appdata\roaming\python\python38\site- 
packages (from notebook->jupyter) (19.0.2)
Requirement already satisfied: terminado>=0.8.3 in c:\users\this 
pc\appdata\local\programs\python\python38\lib\site-packages (from notebook->jupyter) (0.8.3)
Requirement already satisfied: prometheus-client in c:\users\this 
pc\appdata\local\programs\python\python38\lib\site-packages (from notebook->jupyter) (0.8.0)
Requirement already satisfied: traitlets>=4.2.1 in c:\users\this 
pc\appdata\roaming\python\python38\site-packages (from notebook->jupyter) (4.3.3)
Requirement already satisfied: argon2-cffi in c:\users\this 
pc\appdata\local\programs\python\python38\lib\site-packages (from notebook->jupyter) (20.1.0)
Requirement already satisfied: jinja2 in c:\users\this 
pc\appdata\local\programs\python\python38\lib\site-packages (from notebook->jupyter) (2.11.2)
Requirement already satisfied: tornado>=5.0 in c:\users\this pc\appdata\roaming\python\python38\site- 
packages (from notebook->jupyter) (6.0.4)
Requirement already satisfied: jupyter-core>=4.6.1 in c:\users\this 
pc\appdata\roaming\python\python38\site-packages (from notebook->jupyter) (4.6.3)
...
WARNING: You are using pip version 20.1.1; however, version 20.2.2 is available.
You should consider upgrading via the 'c:\users\this 
pc\appdata\local\programs\python\python38\python.exe -m pip install --upgrade pip' command.

After that I tried to access jupyter notebook by the following cmd line python -m jupyter command but instead of opening in a web browser it is showing me the following error message.

Traceback (most recent call last):
File "c:\users\this pc\appdata\local\programs\python\python38\lib\runpy.py", line 194, in 
_run_module_as_main
return _run_code(code, main_globals, None,
File "c:\users\this pc\appdata\local\programs\python\python38\lib\runpy.py", line 87, in _run_code
exec(code, run_globals)
File "C:\Users\This PC\AppData\Local\Programs\Python\Python38\Scripts\jupyter- 
notebook.EXE\__main__.py", line 4, in <module>
File "c:\users\this pc\appdata\local\programs\python\python38\lib\site- 
packages\notebook\notebookapp.py", line 51, in <module>
from zmq.eventloop import ioloop
File "C:\Users\This PC\AppData\Roaming\Python\Python38\site-packages\zmq\__init__.py", line 50, in 
 <module>
from zmq import backend
File "C:\Users\This PC\AppData\Roaming\Python\Python38\site-packages\zmq\backend\__init__.py", line 
40, in <module>
reraise(*exc_info)
File "C:\Users\This PC\AppData\Roaming\Python\Python38\site-packages\zmq\utils\sixcerpt.py", line 34, 
in reraise
raise value
 File "C:\Users\This PC\AppData\Roaming\Python\Python38\site-packages\zmq\backend\__init__.py", line 
 27, in <module>
_ns = select_backend(first)
 File "C:\Users\This PC\AppData\Roaming\Python\Python38\site-packages\zmq\backend\select.py", line 
 28, in select_backend
 mod = __import__(name, fromlist=public_api)
 File "C:\Users\This PC\AppData\Roaming\Python\Python38\site- 
 packages\zmq\backend\cython\__init__.py", line 6, in <module>
from . import (constants, error, message, context,
ImportError: cannot import name 'constants' from partially initialized module 'zmq.backend.cython' 
(most likely due to a circular import) (C:\Users\This PC\AppData\Roaming\Python\Python38\site- 
packages\zmq\backend\cython\__init__.py)

Note that

1. I've already added python to the environment variable so there's nothing wrong there. I checked twice.

In the path folder I've these items

so what should I do now?

Answer 1

Try using jupyter notebook alone. From my knowledge, python -m is for referencing modules and it could just be causing problems.

Answer 2

Finally solved it, I had to reinstall everything and add another path option to the environment variable which is C:\\Users\\This PC\\AppData\\Roaming\\Python\\Python38\\Scripts the previous path was in the local folder and this one is in the Roaming folder. This did the trick for me.