{"id": "internals:internals-datasette", "page": "internals", "ref": "internals-datasette", "title": "Datasette class", "content": "This object is an instance of the  Datasette  class, passed to many plugin hooks as an argument called  datasette . \n             You can create your own instance of this - for example to help write tests for a plugin - like so: \n             from datasette.app import Datasette\n\n# With no arguments a single in-memory database will be attached\ndatasette = Datasette()\n\n# The files= argument can load files from disk\ndatasette = Datasette(files=[\"/path/to/my-database.db\"])\n\n# Pass metadata as a JSON dictionary like this\ndatasette = Datasette(\n    files=[\"/path/to/my-database.db\"],\n    metadata={\n        \"databases\": {\n            \"my-database\": {\n                \"description\": \"This is my database\"\n            }\n        }\n    },\n) \n             Constructor parameters include: \n             \n                 \n                     files=[...]  - a list of database files to open \n                 \n                 \n                     immutables=[...]  - a list of database files to open in immutable mode \n                 \n                 \n                     metadata={...}  - a dictionary of  Metadata \n                 \n                 \n                     config_dir=...  - the  configuration directory  to use, stored in  datasette.config_dir", "breadcrumbs": "[\"Internals for plugins\"]", "references": "[]"}