Create README.md

README.md

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+---
+license: odc-by
+---
+
+# DuckDB datasets for (dump, id) querying on FineWeb 2
+
+## Download
+
+All files:
+
+```shell
+huggingface-cli download BramVanroy/fineweb-2-duckdbs --local-dir duckdbs/fineweb-2/ --include *.duckdb --repo-type dataset
+```
+
+One file:
+
+```shell
+huggingface-cli download BramVanroy/fineweb-2-duckdbs fw2-deu_Latn.duckdb --local-dir duckdbs/fineweb-2/ --repo-type dataset
+```
+
+
+## Usage
+
+```python
+import re
+import duckdb
+
+uuid_re = re.compile(r"<urn:uuid:([a-zA-Z0-9]{8}-?[a-zA-Z0-9]{4}-?[a-zA-Z0-9]{4}-?[a-zA-Z0-9]{4}-?[a-zA-Z0-9]{12})>")
+duckdb_path = "duckdbs/fineweb-2/fw2-deu_Latn.duckdb"
+
+dump = "CC-MAIN-2013-20"
+uuid_urn = "<urn:uuid:4cd2db15-ae0c-482a-8688-d023d4b19f60>"
+# !! Important: extract the UUID from the URN
+uid = uuid_re.sub("\\1", uuid_urn).replace("-", "")
+
+query = "SELECT EXISTS (SELECT 1 FROM dataset WHERE dump = ? AND id = ?)"
+exists = bool(con.execute(query, (dump, uuid)).fetchone()[0])
+
+print(f"Does ID {uid} exist in {dump}? {exists}")
+```