Notebooks as reusable Python programs(marimo.io)

  # %% [markdown]
  # Another Markdown cell

  # %%
  # This is a code cell
  class A():
      def one():
          return 1


  # %% Optional title [cell type] key="value"

  ```{code-cell} LANGUAGE
  :key: value

  CODE TO BE EXECUTED
  ```

  ---
  kernelspec:
    name: javascript
    display_name: JavaScript
  ---

  # Another markdown cell

  ```{code-cell} javascript
  // This is a code cell
  console.log("hello javascript kernel");
  ```