quantlab.backend.parquet#
The Parquet storage backend: long-format tables read lazily through polars.
PlBackend holds a polars.LazyFrame and persists it as Parquet. It is used
for reference tables that are tabular rather than panel shaped (the universe
catalog in quantlab.universe), and implements DataBackend from
quantlab.backend.base; see docs/user-guide/datasets.md.
Classes
Parquet-backed storage for a long-format table held as a lazy frame. |