Bonjour,

Je travaille avec Pyzo comme IDE pour Python et j'ai bien une version Python 3. J'ai déjà installé grâce à la commande
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pip install jupyter
Jupyter Notebook. Et quand je vais sur l'interpréteur de commande pour lancer Jupyter Notebook, je vois le message suivant :
'jupyter' n'est pas reconnu en tant que commande interne ou externe, un programme exécutable ou un fichier de commande.

Je ne sais pas d'où peut provenir le problème. Je ne sais pas si ca peut aider, mais quand j'écris python j'ai le même message d'erreur. Mais si j'écris py alors l'interpréteur de commandes deviens un interpréteur de commandes Python.

J'ai revérifié l'installation et j'ai :

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Requirement already satisfied: jupyter in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (1.0.0)
Requirement already satisfied: notebook in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from jupyter) (6.0.2)
Requirement already satisfied: qtconsole in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from jupyter) (4.6.0)
Requirement already satisfied: ipykernel in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from jupyter) (5.1.3)
Requirement already satisfied: nbconvert in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from jupyter) (5.6.1)
Requirement already satisfied: jupyter-console in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from jupyter) (6.0.0)
Requirement already satisfied: ipywidgets in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from jupyter) (7.5.1)
Requirement already satisfied: jupyter-client>=5.3.4 in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from notebook->jupyter) (5.3.4)
Requirement already satisfied: Send2Trash in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from notebook->jupyter) (1.5.0)
Requirement already satisfied: tornado>=5.0 in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from notebook->jupyter) (6.0.3)
Requirement already satisfied: ipython-genutils in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from notebook->jupyter) (0.2.0)
Requirement already satisfied: traitlets>=4.2.1 in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from notebook->jupyter) (4.3.3)
Requirement already satisfied: jinja2 in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from notebook->jupyter) (2.10.3)
Requirement already satisfied: jupyter-core>=4.6.0 in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from notebook->jupyter) (4.6.1)
Requirement already satisfied: nbformat in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from notebook->jupyter) (4.4.0)
Requirement already satisfied: terminado>=0.8.1 in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from notebook->jupyter) (0.8.3)
Requirement already satisfied: pyzmq>=17 in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from notebook->jupyter) (18.1.1)
Requirement already satisfied: prometheus-client in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from notebook->jupyter) (0.7.1)
Requirement already satisfied: pygments in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from qtconsole->jupyter) (2.5.2)
Requirement already satisfied: ipython>=5.0.0 in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from ipykernel->jupyter) (7.10.1)
Requirement already satisfied: mistune<2,>=0.8.1 in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from nbconvert->jupyter) (0.8.4)
Requirement already satisfied: entrypoints>=0.2.2 in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from nbconvert->jupyter) (0.3)
Requirement already satisfied: pandocfilters>=1.4.1 in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from nbconvert->jupyter) (1.4.2)
Requirement already satisfied: bleach in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from nbconvert->jupyter) (3.1.0)
Requirement already satisfied: defusedxml in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from nbconvert->jupyter) (0.6.0)
Requirement already satisfied: testpath in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from nbconvert->jupyter) (0.4.4)
Requirement already satisfied: prompt-toolkit<2.1.0,>=2.0.0 in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from jupyter-console->jupyter) (2.0.10)
Requirement already satisfied: widgetsnbextension~=3.5.0 in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from ipywidgets->jupyter) (3.5.1)
Requirement already satisfied: python-dateutil>=2.1 in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from jupyter-client>=5.3.4->notebook->jupyter) (2.8.0)
Requirement already satisfied: pywin32>=1.0; sys_platform == "win32" in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from jupyter-client>=5.3.4->notebook->jupyter) (227)
Requirement already satisfied: decorator in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from traitlets>=4.2.1->notebook->jupyter) (4.4.1)
Requirement already satisfied: six in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from traitlets>=4.2.1->notebook->jupyter) (1.12.0)
Requirement already satisfied: MarkupSafe>=0.23 in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from jinja2->notebook->jupyter) (1.1.1)
Requirement already satisfied: jsonschema!=2.5.0,>=2.4 in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from nbformat->notebook->jupyter) (3.2.0)
Requirement already satisfied: pywinpty>=0.5; os_name == "nt" in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from terminado>=0.8.1->notebook->jupyter) (0.5.7)
Requirement already satisfied: backcall in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from ipython>=5.0.0->ipykernel->jupyter) (0.1.0)
Requirement already satisfied: setuptools>=18.5 in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from ipython>=5.0.0->ipykernel->jupyter) (40.8.0)
Requirement already satisfied: colorama; sys_platform == "win32" in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from ipython>=5.0.0->ipykernel->jupyter) (0.4.1)
Requirement already satisfied: pickleshare in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from ipython>=5.0.0->ipykernel->jupyter) (0.7.5)
Requirement already satisfied: jedi>=0.10 in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from ipython>=5.0.0->ipykernel->jupyter) (0.15.1)
Requirement already satisfied: webencodings in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from bleach->nbconvert->jupyter) (0.5.1)
Requirement already satisfied: wcwidth in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from prompt-toolkit<2.1.0,>=2.0.0->jupyter-console->jupyter) (0.1.7)
Requirement already satisfied: attrs>=17.4.0 in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from jsonschema!=2.5.0,>=2.4->nbformat->notebook->jupyter) (19.3.0)
Requirement already satisfied: importlib-metadata; python_version < "3.8" in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from jsonschema!=2.5.0,>=2.4->nbformat->notebook->jupyter) (1.2.0)
Requirement already satisfied: pyrsistent>=0.14.0 in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from jsonschema!=2.5.0,>=2.4->nbformat->notebook->jupyter) (0.15.6)
Requirement already satisfied: parso>=0.5.0 in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from jedi>=0.10->ipython>=5.0.0->ipykernel->jupyter) (0.5.1)
Requirement already satisfied: zipp>=0.5 in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from importlib-metadata; python_version < "3.8"->jsonschema!=2.5.0,>=2.4->nbformat->notebook->jupyter) (0.6.0)
Requirement already satisfied: more-itertools in c:\users\utilisateur\appdata\local\programs\python\python37-32\lib\site-packages (from zipp>=0.5->importlib-metadata; python_version < "3.8"->jsonschema!=2.5.0,>=2.4->nbformat->notebook->jupyter) (8.0.1)
Donc il n'y a pas de problème dans son installation.

Modification : Je viens de voir maintenant un autre post qui suggérait d'aller vers : [I]"C:\Users\<username>\AppData\Roaming\Python\Python35\Scripts\jupyter.exe". Bon moi je ne trouve pas le dossier Python dans Roaming mais dans Local puis Programs. Et dans Scripts je trouve bien jupyter.exe mais son icône est celle d'un programme Python et ca ouvre juste le terminal puis le referme rapidement sans rien faire... J'ai aussi d'autres .exe comme jupyter-bundlerextension...

Je ne peux pas utiliser Anaconda donc passer par le terminal est vraiment la seule solution que j'ai. J'espère que vous pourrez m'aider afin de pouvoir utiliser Jupyter Notebook.

Merci par avance.