Writing code in a Jupyter Notebook

Jupyter notebook is used for writing and running Python code.

 Creating and saving a Jupyter notebook

Use the following steps:

• ·         Open Anaconda and launch Jupyter Notebooks.
• ·         On the first page create a folder for Jupyter.
• ·         Navigate to the Jupyter Notebooks folder.
• ·         Click New and choose Python 3.
• ·         Opened click Untitled, type in the new name 01 Notebook, and click Rename. 
•         The notebook is created and saved in your AIO Python folder

·         Typing Python code into any Code cell and text into any Markdown cell and running code in a notebook:-

 ·          

Use the following steps:-

•       Click in the Code cell (to the right of In [ ]: and type print(“Hello World”) and don’t forget to use lowercase letters for the word print.
•      To run the code, hold down the Alt key (in Windows) or the Option key (on a Mac) and press Enter, or click the Play triangle to the left of the word In.
•         (To run a piece of code, click on the cell to select it, then press SHIFT+ENTER or press the play button in the toolbar above. Additionally, the Cell dropdown menu has several options to run cells, including running one cell at a time or running all cells at once.)

 

·         After running a cell, the output of the cell’s code will appear in the space below.

·         To stop running a piece of code, press the stop button.

Adding some Markdown text

• ·         We can add text (and actually pictures and video) to Jupyter notebooks.

For formatting or adding pictures and videos:-

• ·         Use Markdown from the dropdown menu in the toolbar.
• ·         Markdown is a popular markup language, (simplified HTML).
• ·         Type up the Markdown content in VS Code and then copy/paste it over into a Markdown cell than it is to type directly in the Markdown cell in Jupyter.

·         To create new cells, use the plus (+) button in the toolbar or hit SHIFT+ENTER on the last cell in the Notebook.

·         To cut, copy, delete or just generally edit cells - select the cell to modify and go to the Edit button in the navigation bar.

·         Also include text-only cells that use Markdown to format and organize notebooks.

·         To create a cell that uses markdown, click on the Cell menu from the navigation bar, scroll down to Cell Type and choose Markdown.

·         For restart the kernel. Select the Kernel dropdown and hit Restart.

·         To shut down a kernel, click on Shutdown.

 

·         In the Help dropdown, find useful information such as keyboard shortcuts, links to different documentation for modules such as Numpy, scipy, and Matplotlib.

 

·         The toolbar has several shortcut buttons for popular actions.

·         From left to right: save, add a new cell, cut selected cells, copy selected cells, paste cells below, move selected cells up, move selected cells down, run, interrupt the kernel, restart the kernel, a dropdown that allows you to change the cell type, and a shortcut to open the command palette.

·         Jupyter Notebook files are saved as we go.

·         They will exist in our directory as a JSON file with the extension .ipynb.

·         For the export of Jupyter Notebooks in other formats, such as HTML. Go to the File menu, scroll down to Download as, and select the type of file looking for.

·         A popup will appear asking where would like this new file to download.

·         Navigated to the appropriate directory, click Save and Checkpoint.

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