If you want to customize the Code Interprerter sandbox (e.g.: add a preinstalled package) you can do that by using a custom sandbox template.

1. Create custom sandbox by following this guide

2. Use prebuilt E2B Code Interpreter image by replacing the FROM command in your e2b.Dockerfile with following

   FROM e2bdev/code-interpreter:latest

3. Copy start-up.sh to the same directory where's your e2b.toml

4. Run the following in the same directory where's your e2b.toml

   e2b template build -c "/root/.jupyter/start-up.sh"

5. Use your custom sandbox with Code Interpreter SDK

   Python

   from e2b_code_interpreter import CodeInterpreter
   sandbox = CodeInterpreter(template="your-custom-sandbox-name")
   execution = sandbox.notebook.exec_cell("print('hello')")
   sandbox.close()
   
   # Or you can use `with` which handles closing the sandbox for you
   with CodeInterpreter(template="your-custom-sandbox-name") as sandbox:
       execution = sandbox.notebook.exec_cell("print('hello')")

   JavaScript/TypeScript

   import { CodeInterpreter } from '@e2b/code-interpreter'
   const sandbox = await CodeInterpreter.create({ template: 'your-custom-sandbox-name' })
   const execution = await sandbox.notebook.execCell('print("hello")')
   await sandbox.close()