Update Python language section + Flask tutorial (#6144)

* Update notebooks and install sections for Python language page

* Update wording on flask tutorial

* Fix typos

Author: luabud

docs/languages/images/python/native-jupyter.png

@@ -19,7 +19,7 @@ This article provides only an overview of the different capabilities of the Pyth
 
 The [tutorial](/docs/python/python-tutorial.md) guides you through installing Python and using the extension. You must install a Python interpreter yourself separately from the extension. For a quick install, use [Python from python.org](https://www.python.org/downloads/) and [install the extension from the VS Code Marketplace](https://marketplace.visualstudio.com/items?itemName=ms-python.python).
 
-Once you have a version of Python installed, activate it using the **Python: Select Interpreter** command. If VS Code doesn't automatically locate the interpreter you're looking for, refer to [Environments - Manually specify an interpreter](/docs/python/environments.md#manually-specify-an-interpreter).
+Once you have a version of Python installed, select it using the **Python: Select Interpreter** command. If VS Code doesn't automatically locate the interpreter you're looking for, refer to [Environments - Manually specify an interpreter](/docs/python/environments.md#manually-specify-an-interpreter).
 
 You can configure the Python extension through settings. Learn more in the [Python Settings reference](/docs/python/settings-reference.md).
 
@@ -108,17 +108,15 @@ Packages are installed using the **Terminal** panel and commands like `pip insta
 
 ## Jupyter notebooks
 
-If you open a [Jupyter notebook](https://jupyter.org/) file (`.ipynb`) in VS Code, you can use the Jupyter Notebook Editor to directly view, modify, and run code cells.
+To enable Python support for [Jupyter notebook](https://jupyter.org/) files (`.ipynb`) in VS Code, you can install the [Jupyter extension](https://marketplace.visualstudio.com/items?itemName=ms-toolsai.jupyter). The Python and the Jupyter extensions work together to give you a great Notebook experience in VS Code, providing you the ability to directly view and modify code cells with IntelliSense support, as well as run and debug them.
 
 ![Jupyter notebook running in VS code in the Notebook Editor](images/python/native-jupyter.png)
 
-You can also convert and open the notebook as a Python code file. The notebook's cells are delimited in the Python file with `#%%` comments, and the Python extension shows **Run Cell** or **Run All Cells** CodeLens. Selecting either CodeLens starts the Jupyter server and runs the cell(s) in the Python interactive window:
+You can also convert and open the notebook as a Python code file through the **Jupyter: Export to Python Script** command. The notebook's cells are delimited in the Python file with `#%%` comments, and the Jupyter extension shows **Run Cell** or **Run Below** CodeLens. Selecting either CodeLens starts the Jupyter server and runs the cell(s) in the Python interactive window:
 
 ![Jupyter notebook running in VS Code and the Python interactive window](images/python/jupyter.png)
 
-Opening a notebook as a Python file allows you to use all of VS Code's debugging capabilities. You can then save the notebook file and open it again as a notebook in the Notebook Editor, Jupyter, or even upload it to a service like [Azure Notebooks](https://learn.microsoft.com/azure/notebooks).
-
-Using either method, Notebook Editor or a Python file, you can also connect to a remote Jupyter server for running the code. For more information, see [Jupyter support](/docs/datascience/jupyter-notebooks.md).
+You can also connect to a remote Jupyter server to run your notebooks. For more information, see [Jupyter support](/docs/datascience/jupyter-notebooks.md).
 
 ## Testing
 

docs/languages/python.md

@@ -111,7 +111,7 @@ You now have a self-contained environment ready for writing Flask code. VS Code
 
 1. Stop the app by using `kbstyle(Ctrl+C)` in the terminal.
 
-> **Tip**: If you want to use a different filename than `app.py`, such as `program.py`, define an environment variable named FLASK_APP and set its value to your chosen file. Flask's development server then uses the value of FLASK_APP instead of the default file `app.py`. For more information, see [Flask command line interface](https://flask.palletsprojects.com/en/1.1.x/cli/).
+> **Tip**: When using a different filename than `app.py`, such as `webapp.py`, you will need to define an environment variable named FLASK_APP and set its value to your chosen file. Flask's development server then uses the value of FLASK_APP instead of the default file `app.py`. For more information, see [Flask command line interface](https://flask.palletsprojects.com/en/1.1.x/cli/).
 
 ## Run the app in the debugger
 
@@ -634,7 +634,7 @@ Throughout this Flask tutorial, all the app code is contained in a single `app.p
     ![Flask tutorial: modified project structure with separate files and folders for parts of the app](images/flask-tutorial/project-structure.png)
 
 1. Run the app in the debugger again to make sure everything works. To run the app outside of the VS Code debugger, use the following steps from a terminal:
-    1. Set an environment variable for `FLASK_APP`. On Linux and macOS, use `export set FLASK_APP=webapp`; on Windows use `set FLASK_APP=webapp`.
+    1. Set an environment variable for `FLASK_APP`. On Linux and macOS, use `export set FLASK_APP=webapp`; on Windows use `$env:FLASK_APP=webapp` if you're using PowerShell, or `set FLASK_APP=webapp` if you're using Command Prompt.
     1. Navigate into the `hello_app` folder, then launch the program using `python -m flask run`.
 
 ### Create a container for a Flask app using the Docker extension