hydra.pg.terms_to_elements module
Functions for mapping Hydra terms to property graph elements using mapping specifications.
- hydra.pg.terms_to_elements.apply_pattern(cx: T0, first_lit: str, pairs: Sequence[tuple[Sequence[str], str]], term: Term) object
Apply a parsed pattern to a term, producing string terms.
- hydra.pg.terms_to_elements.decode_edge_label(cx: T0, g: Graph, t: Term) object
Decode an edge label from a term.
- hydra.pg.terms_to_elements.decode_edge_spec(cx: T0, g: Graph, term: Term) object
Decode an edge specification from a term.
- hydra.pg.terms_to_elements.decode_element_spec(cx: T0, g: Graph, term: Term) object
Decode an element specification from a term.
- hydra.pg.terms_to_elements.decode_property_key(cx: T0, g: Graph, t: Term) object
Decode a property key from a term.
- hydra.pg.terms_to_elements.decode_property_spec(cx: T0, g: Graph, term: Term) object
Decode a property specification from a term.
- hydra.pg.terms_to_elements.decode_value_spec(cx: T0, g: Graph, term: Term) object
Decode a value specification from a term.
- hydra.pg.terms_to_elements.decode_vertex_label(cx: T0, g: Graph, t: Term) object
Decode a vertex label from a term.
- hydra.pg.terms_to_elements.decode_vertex_spec(cx: T0, g: Graph, term: Term) object
Decode a vertex specification from a term.
- hydra.pg.terms_to_elements.eval_path(cx: T0, path: Sequence[str], term: Term) object
Evaluate a path (list of steps) on a term, returning all resulting terms.
- hydra.pg.terms_to_elements.eval_step(cx: T0, step: str, term: Term) object
Evaluate a single step of a path traversal on a term.
- hydra.pg.terms_to_elements.expect_list(cx: T0, g: Graph, f: Callable[[T0, Graph, Term], object], term: Term) object
Extract a list from a term and apply a decoder to each element.
- hydra.pg.terms_to_elements.parse_edge_id_pattern(cx: T0, g: T1, schema: Schema[T2, T3, T4, Error], spec: ValueSpec) object
Parse an edge id pattern from a value spec and schema.
- hydra.pg.terms_to_elements.parse_edge_spec(cx: T0, g: T1, schema: Schema[T2, T3, T4, Error], spec: EdgeSpec) object
Parse an edge specification into a label and encoder function.
- hydra.pg.terms_to_elements.parse_element_spec(cx: T0, g: T1, schema: Schema[T2, T3, T4, Error], spec: ElementSpec) object
Parse an element specification into a label and encoder function.
- hydra.pg.terms_to_elements.parse_pattern(cx: T0, _g: T1, pat: str) object
Parse a string pattern into a function that traverses terms.
- hydra.pg.terms_to_elements.parse_property_spec(cx: T0, g: T1, schema: Schema[T2, T3, T4, Error], spec: PropertySpec) object
Parse a property specification into an encoder function.
- hydra.pg.terms_to_elements.parse_value_spec(cx: T0, g: T1, spec: ValueSpec) object
Parse a value specification into a function that processes terms.
- hydra.pg.terms_to_elements.parse_vertex_id_pattern(cx: T0, g: T1, schema: Schema[T2, T3, T4, Error], spec: ValueSpec) object
Parse a vertex id pattern from a value spec and schema.
- hydra.pg.terms_to_elements.parse_vertex_spec(cx: T0, g: T1, schema: Schema[T2, T3, T4, Error], spec: VertexSpec) object
Parse a vertex specification into a label and encoder function.
- hydra.pg.terms_to_elements.read_field(cx: T0, fields: Mapping[Name, T1], fname: Name, fun: Callable[[T1], object]) object
Read a field from a map of fields by name.
- hydra.pg.terms_to_elements.read_injection(cx: T0, g: Graph, cases: Sequence[tuple[Name, Callable[[Term], object]]], encoded: Term) object
Read an injection (union value) from a term.
- hydra.pg.terms_to_elements.read_record(cx: T0, g: Graph, cons: Callable[[Mapping[Name, Term]], object], term: Term) object
Read a record from a term as a map of field names to values.
- hydra.pg.terms_to_elements.require_unique(cx: T0, context: str, fun: Callable[[T1], object], term: T1) object
Require exactly one result from a list-producing function.