`sandbox` is the name of the pre-configured sandbox, and `command` is the name of a command supported by that sandbox. See [Adding a sandbox](add-sandbox.md) for details on how to add a new sandbox.
`files` is a map, where the key is a filename and the value is its contents. When executing a single file, it should either be named as the `command` expects, or be an empty string (as in the example above).
Response:
```http
HTTP/1.1 200 OK
Content-Type: application/json
{
"id": "python_run_9b7b1afd",
"ok": true,
"duration": 314,
"stdout": "hello world\n",
"stderr": ""
}
```
-`id` is the unique execution identifier.
-`ok` is `true` if the code executed without errors, or `false` otherwise.
-`duration` is the execution time in milliseconds.
-`stdout` is what the code printed to the standard output.
-`stderr` is what the code printed to the standard error, or a compiler/os error (if any).
