Do you need to delete all Markdown / non Markdown cells from Jupyter? In this short guide, we'll see how to delete programmatically cells in Jupyter Notebook or JupyterLab.
Step 1: Delete All Markdown Cells in Jupyter
The first example will show you how to delete all Markdown cells in the current notebook -
import nbformat as nbf ntbk = nbf.read("Markdown.ipynb", nbf.NO_CONVERT) new_ntbk = ntbk new_ntbk.cells = [cell for cell in ntbk.cells if cell.cell_type != "markdown"] nbf.write(new_ntbk, "MarkdownDeleted.ipynb", version=nbf.NO_CONVERT)
New Notebook is created where Markdown cells are deleted. The same notebook can be used but this can lead to code loss.
The code above will keep any cell which is not Markdown.
Note: If you need to recover deleted information from your Jupyter Notebooks please check: 6 ways to Recover deleted Jupyter Notebook (including JupyterLab)
Step 2: Delete All Cells Except Markdown in Jupyter
What if you want to keep only the Markdown cells? Then you can change the code above to:
import nbformat as nbf ntbk = nbf.read("Markdown.ipynb", nbf.NO_CONVERT) new_ntbk = ntbk new_ntbk.cells = [cell for cell in ntbk.cells if cell.cell_type == "markdown"] nbf.write(new_ntbk, "OnlyMarkdown.ipynb", version=nbf.NO_CONVERT)
Note: Similar logic can be applied for Code/Raw cells which are marked as cell_type -
Pro tip: If you want to delete cells based on input then you can change:
if cell.cell_type == "markdown" to
Delete me or
You need to place this code inside your Notebook and then execute it. Have in mind that this might delete the cell itself as well.
Step 4: Jupyter Delete Cell with Shortcut
If you need to delete the cells one by one then you can use a shortcut in order to speed up the process. So to delete a single cell you can:
- click on the cell number area
- Press D - two times
Another way is by using a different approach. While you are working on the cell:
- press Escape
- then press X
This will cut the cell. Later if you want you can paste it by pressing V
Note: Selecting the cell number or escaping from the input focus allow the usage of shortcuts.
Note 2: If you like to see all Jupyter Notebook shortcuts then you can do it by:
- Keyboard Shortcuts
Step 5: Jupyter Delete Multiple Cells with Shortcut
The final example is about selection and deletion of multiple cells at once with Jupyter Notebook. So first we need to select all cells which will be deleted:
- click on the cell number ( the left part of the cell input)
- click on another cell while pressing Shift
- Finally press X or press two times D