# Code contexts (/docs/code-interpreting/contexts)

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Related: [Analyze data with AI](/docs/code-interpreting/analyze-data-with-ai.md), [Create charts & visualizations](/docs/code-interpreting/create-charts-visualizations.md), [Customize the template](/docs/code-interpreting/customize-template.md), [Streaming](/docs/code-interpreting/streaming.md), [Supported languages](/docs/code-interpreting/supported-languages.md)

Run code in different code execution contexts with E2B Code Interpreter SDK. This allows you to parallelize code execution by running code in different contexts at the same time.

By default the code is run in the Sandbox's default code execution context. You can change it by passing the `context` parameter to the `runCode()` method in JavaScript or `run_code()` in Python.

## Create a new Code Context [#create-a-new-code-context]

You can create a new code execution context by calling the `createCodeContext()` method in JavaScript or `create_code_context()` in Python and passing the context parameters.

<CodeGroup>
  <CodeBlockTabs defaultValue="JavaScript & TypeScript" groupId="javascript-typescript+python">
    <CodeBlockTabsList>
      <CodeBlockTabsTrigger value="JavaScript & TypeScript">
        JavaScript & TypeScript
      </CodeBlockTabsTrigger>

      <CodeBlockTabsTrigger value="Python">
        Python
      </CodeBlockTabsTrigger>
    </CodeBlockTabsList>

    <CodeBlockTab value="JavaScript & TypeScript">
      ```js  
      import { Sandbox } from '@e2b/code-interpreter'

      const sandbox = await Sandbox.create()
      const context = await sandbox.createCodeContext({
        cwd: '/home/user',
        language: 'python',
        requestTimeoutMs: 60_000,
      })

      const result = await sandbox.runCode('print("Hello, world!")', { context })
      console.log(result)
      ```
    </CodeBlockTab>

    <CodeBlockTab value="Python">
      ```python  
      from e2b_code_interpreter import Sandbox

      sandbox = Sandbox.create()
      context = sandbox.create_code_context(
          cwd='/home/user',
          language='python',
          request_timeout=60_000,
      )
      result = sandbox.run_code('print("Hello, world!")', context=context)
      print(result)
      ```
    </CodeBlockTab>
  </CodeBlockTabs>
</CodeGroup>

## List active Code Contexts [#list-active-code-contexts]

You can list active code execution contexts by calling the `listCodeContexts()` method in JavaScript or `list_code_contexts()` in Python. This will return a list of active code execution contexts.

<CodeGroup>
  <CodeBlockTabs defaultValue="JavaScript & TypeScript" groupId="javascript-typescript+python">
    <CodeBlockTabsList>
      <CodeBlockTabsTrigger value="JavaScript & TypeScript">
        JavaScript & TypeScript
      </CodeBlockTabsTrigger>

      <CodeBlockTabsTrigger value="Python">
        Python
      </CodeBlockTabsTrigger>
    </CodeBlockTabsList>

    <CodeBlockTab value="JavaScript & TypeScript">
      ```js  
      import { Sandbox } from '@e2b/code-interpreter'

      const sandbox = await Sandbox.create()
      const contexts = await sandbox.listCodeContexts()
      console.log(contexts)
      ```
    </CodeBlockTab>

    <CodeBlockTab value="Python">
      ```python  
      from e2b_code_interpreter import Sandbox

      sandbox = Sandbox.create()
      contexts = sandbox.list_code_contexts()
      print(contexts)
      ```
    </CodeBlockTab>
  </CodeBlockTabs>
</CodeGroup>

## Restart a Code Context [#restart-a-code-context]

You can restart an active code execution context by calling the `restartCodeContext()` method in JavaScript or `restart_code_context()` in Python and passing the context object or context ID.
Restarting a context will clear its state and start a new code execution session in the same context.

<CodeGroup>
  <CodeBlockTabs defaultValue="JavaScript & TypeScript" groupId="javascript-typescript+python">
    <CodeBlockTabsList>
      <CodeBlockTabsTrigger value="JavaScript & TypeScript">
        JavaScript & TypeScript
      </CodeBlockTabsTrigger>

      <CodeBlockTabsTrigger value="Python">
        Python
      </CodeBlockTabsTrigger>
    </CodeBlockTabsList>

    <CodeBlockTab value="JavaScript & TypeScript">
      ```js  
      import { Sandbox } from '@e2b/code-interpreter'

      const sandbox = await Sandbox.create()
      const context = await sandbox.createCodeContext({
        cwd: '/home/user',
        language: 'python',
        requestTimeoutMs: 60_000,
      })

      // using context object
      await sandbox.restartCodeContext(context)

      // using context ID
      await sandbox.restartCodeContext(context.contextId)
      ```
    </CodeBlockTab>

    <CodeBlockTab value="Python">
      ```python  
      from e2b_code_interpreter import Sandbox

      sandbox = Sandbox.create()
      context = sandbox.create_code_context(
          cwd='/home/user',
          language='python',
          request_timeout=60_000,
      )

      # using context object
      restarted_context = sandbox.restart_code_context(context)
      print(restarted_context)

      # using context ID
      restarted_context = sandbox.restart_code_context(context.contextId)
      print(restarted_context)
      ```
    </CodeBlockTab>
  </CodeBlockTabs>
</CodeGroup>

## Remove a Code Context [#remove-a-code-context]

You can remove an active code execution context by calling the `removeCodeContext()` method in JavaScript or `remove_code_context()` in Python and passing the context object or context ID.

<CodeGroup>
  <CodeBlockTabs defaultValue="JavaScript & TypeScript" groupId="javascript-typescript+python">
    <CodeBlockTabsList>
      <CodeBlockTabsTrigger value="JavaScript & TypeScript">
        JavaScript & TypeScript
      </CodeBlockTabsTrigger>

      <CodeBlockTabsTrigger value="Python">
        Python
      </CodeBlockTabsTrigger>
    </CodeBlockTabsList>

    <CodeBlockTab value="JavaScript & TypeScript">
      ```js  
      import { Sandbox } from '@e2b/code-interpreter'

      const sandbox = await Sandbox.create()
      const context = await sandbox.createCodeContext({
          cwd: '/home/user',
          language: 'python',
          requestTimeoutMs: 60_000,
      })

      // using context object
      await sandbox.removeCodeContext(context)

      // using context ID
      await sandbox.removeCodeContext(context.contextId)
      ```
    </CodeBlockTab>

    <CodeBlockTab value="Python">
      ```python  
      from e2b_code_interpreter import Sandbox

      sandbox = Sandbox.create()
      context = sandbox.create_code_context(
          cwd='/home/user',
          language='python',
          request_timeout=60_000,
      )

      # using context object
      sandbox.remove_code_context(context)

      # using context ID
      sandbox.remove_code_context(context.contextId)
      ```
    </CodeBlockTab>
  </CodeBlockTabs>
</CodeGroup>