Jupyter (formerly IPython) is an open-source project that lets you easily combine Markdown text and executable Python source code on one canvas called a notebook. Visual Studio Code supports working with Jupyter Notebooks natively, as well as through Python code files. This topic covers the native support available for Jupyter Notebooks and demonstrates how to:
To work with Jupyter notebooks, you must activate an Anaconda environment in VS Code, or another Python environment in which you’ve installed the Jupyter package. To select an environment, use the Python: Select Interpreter command from the Command Palette (⇧⌘P (Windows, Linux Ctrl+Shift+P)).
Once the appropriate environment is activated, you can create and open a Jupyter Notebook, connect to a remote Jupyter server for running code cells, and export a Jupyter Notebook as a Python files.
Note: By default, the Visual Studio Code Python extension will open a Jupyter Notebook (.ipynb) in the Notebook Editor. If you want to disable this behavior you can turn it off in settings. (Python > Data Science: Use Notebook Editor).
You can create a Jupyter Notebook by running the Python: Create Blank New Jupyter Notebook command from the Command Palette (⇧⌘P (Windows, Linux Ctrl+Shift+P)) or by creating a new .ipynb file in your workspace. When you select the file, the Notebook Editor is launched allowing you to edit and run code cells.
If you have an existing Jupyter Notebook, you can open it in the Notebook Editor by double clicking on the file and opening with Visual Studio Code, through the Visual Studio Code, or using the Command Palette Python: Open in Notebook Editor command.
Once you have a Notebook created, you can run a code cell using the green run icon next to the cell and the output will appear directly below the code cell.
You can save your Jupyter Notebook using the keyboard combo Ctrl+S or through the save icon on the Notebook Editor toolbar.
Note: At present, you must use the methods discussed above to save your Notebook. The File>Save menu does not save your Notebook, just the toolbar icon or keyboard command.
The Notebook Editor makes it easy to create, edit, and run code cells within your Jupyter Notebook.
By default, a blank Notebook will have an empty code cell for you to start with and an existing Notebook will place one at the bottom. Simply add your code to the empty code cell to get started.
msg = "Hello world" print(msg)
While working with code cells a cell can be in three states, unselected, command mode, and edit mode. The current state of a cell is indicated by a vertical bar to the left of a code cell. When no bar is visible, the cell is unselected.
An unselected cell isn’t editable, but you can hover over it to reveal additional cell specific toolbar options. These additional toolbar options appear directly below and to the left of the cell. You’ll also see when hovering over a cell that an empty vertical bar is present to the left.
When a cell is selected, it can be in two different modes. It can be in command mode or in edit mode. When the cell is in command mode, it can be operated on and accept keyboard commands. When the cell is in edit mode, the cell’s contents (code or markdown) can be modified.
When a cell is in command mode, the vertical bar to the left of the cell will be solid to indicate it’s selected.
When you’re in edit mode, the vertical bar will have diagonal lines.
To move from edit mode to command mode, press the ESC key. To move from command mode to edit mode, press the Enter key. You can also use the mouse to change the mode by clicking into or out of the code/markdown region in the code cell.
Code cells can be added to a Notebook using the main toolbar, a code cell’s vertical toolbar, the add code cell icon at the bottom of the Notebook, the add code cell icon at the top of the Notebook (visible with hover), and through keyboard commands.
Using the plus icon in the main toolbar will add a new cell directly below the currently selected cell. Using the add cell icons at the top and bottom of the Jupyter Notebook, will add a code cell at the top and bottom respectively. And using the add icon in the code cell’s toolbar, will add a new code cell directly below it.
When a code cell is in command mode, the A key can be used to add a cell above and the B can be used to add a cell below the selected cell.
The selected code cell can be changed using the mouse, the up/down arrow keys on the keyboard, and the J (up) and K (down) keys. To use the keyboard, the cell must be in command mode.
Once your code is added, you can run a cell using the green run arrow and the output will be displayed below the code cell.
You can also use key combos to run a selected code cell. Ctrl+Enter runs the currently selected cell, Shift+Enter runs the currently selected cell and inserts a new cell immediately below (focus moves to new cell), and Alt+Enter runs the currently selected cell and inserts a new cell immediately below (focus remains on current cell). These keyboard combos can be used in both command and edit modes.
Running multiple code cells can be accomplished in a number of ways. You can use the double arrow in the toolbar of the Notebook Editor to run all cells within the Notebook or the hover toolbar arrows to run all cells above or below the current code cell.
Moving code cells up or down within a Notebook can be accomplished using the vertical arrows beside each code cell. Simply hover over the code cell and then click the up arrow to move the cell up and the down arrow to move the cell down.
Deleting a code cell can be accomplished by hovering over a code cell and using the delete icon in the code cell toolbar or through the keyboard combo dd when the selected code cell is in command mode.
The Notebook Editor allows you to easily change code cells between Markdown and code. By default a code cell is set for code, but just click the Markdown icon (or the code icon, if Markdown was previously set) in the code cell’s toolbar to change it.
Once Markdown is set, you can enter Markdown formatted content to the code cell. Once you select another cell or toggle out of the content selection, the Markdown content is rendered in the Notebook Editor.
You can also use the keyboard to change the cell type. When a cell is selected and in command mode, the M key switches the cell type to Markdown and the Y key switches the cell type to code.
If you’d like to clear the code cell output or restart/interrupt the kernel, you can accomplish that using the main Notebook Editor toolbar.
The Python Jupyter Notebook Editor window has full IntelliSense – code completions, member lists, quick info for methods, and parameter hints. You can be just as productive typing in the Notebook Editor window as you are in the code editor.
Within the Python Notebook Editor, it’s possible to view, inspect, and filter the variables within your current Jupyter session. By clicking the Variables icon in the top toolbar after running code and cells, you’ll see a list of the current variables, which will automatically update as variables are used in code. Clicking on each column header will allow you to sort the variables in the table.
For additional information about your variables, you can also double-click on a row or use the Show variable in data viewer button next to the variable to see a more detailed view of a variable in the Data Viewer. Once open, you can filter the values by searching over the rows.
Note: Variable explorer is enabled by default, but can be turned off in settings (Python > Data Science: Show Jupyter Variable Explorer).
The Plot Viewer gives you the ability to work more deeply with your plots. In the viewer you can pan, zoom, and navigate plots in the current session. You can also export plots to PDF, SVG, and PNG formats.
Within the Notebook Editor window, double-click any plot to open it in the viewer, or select the plot viewer button on the upper left corner of the plot (visible on hover).
Currently, to debug a Jupyter Notebook you will need to first export it as a Python file. Once exported as a Python file, the Visual Studio Code debugger lets you step through your code, set breakpoints, examine state, and analyze problems. Using the debugger is a helpful way to find and correct issues in notebook code. To debug your Python file:
In VS Code, if you haven’t already, activate a Python environment in which Jupyter is installed.
From your Jupyter Notebook (.ipynb) select the convert button in the main toolbar.
Once exported, you’ll have a .py file with your code that you can use for debugging.
After saving the .py file, to start the debugger, use one of the following options:
To familiarize yourself with the general debugging features of VS Code, such as inspecting variables, setting breakpoints, and other activities, review VS Code debugging.
As you find issues, stop the debugger, correct your code, save the file, and start the debugger again.
When you’re satisfied that all your code is correct, use the Python Interactive window to export the Python file as a Jupyter Notebook (.ipynb).
You can offload intensive computation in a Jupyter Notebook to other computers by connecting to a remote Jupyter server. Once connected, code cells run on the remote server rather than the local computer.
To connect to a remote Jupyter server:
Run the Python: Specify Jupyter server URI command from the Command Palette (⇧⌘P (Windows, Linux Ctrl+Shift+P)).
When prompted, provide the server’s URI (hostname) with the authentication token included with a
?token= URL parameter. (If you start the server in the VS Code terminal with an authentication token enabled, the URL with the token typically appears in the terminal output from where you can copy it.) Alternatively, you can specify a username and password after providing the URI.
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Não é todo programador que gosta de compartilhar o seu trabalho ou até mesmo receber feedbacks de como o seu código foi escrito, mas o Code Review é cada vez mais comum em empresas do mundo todo.
Conheça uma extensão para Visual Studio Code e comece a trabalhar com Code Review em seu próximo projeto. Essa é a sua chance de saber COMO USAR e trabalhar com Code Review no Visual Studio Code.
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Jupyter (formerly IPython Notebook) is an open-source project that lets you easily combine Markdown text and executable Python source code on one canvas called a notebook. Visual Studio Code supports working with Jupyter Notebooks natively, as well as through Python code files.
“To me, it’s about storytelling… We all see this tool being used in different ways, but I see it as a fundamental way of telling stories, both for the faculty to tell stories to the students, but also for students to tell stories back to us.”
–Doug Blank, Bryn Mawr College Computer Science Professor
The Notebook API (source: Microsoft).
To use the native support in Visual Studio code for Jupyter Notebooks follow the below steps:
To work with Jupyter notebooks, you must activate an Anaconda environment in VS Code, or another Python environment in which you’ve installed the Jupyter package. To select an environment, use the Python: Select Interpreter command from the Command Palette (Ctrl+Shift+P).
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Hello, my friends and fellow developers, this video is all about User Snippets. That means the Snippets (Code Shortcuts) that you can make for yourself. It is a really amazing feature. I hope you like this video
Let me know in the comments below if you want more Visual Studio Code videos or any other videos. And like the video, if you like it.
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We’re joined by Matt Gertz who will take us down memory lane to share some insights into the history of Visual Studio.
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