Flow cleanup (#1510)

* Move snapshots out of flows into verbs

* Move degree compute out of extract_graph

* Move entity/relationship df merging into extract

* Move "title" to extraction source

* Move text_unit_ids agg closer to extraction

* Move data definition

* Update test data

* Semver

* Update smoke tests

* Fix empty degree field and update smoke tests and verb data

* Move extractors (#1516)

* Consolidate graph embedding and umap

* Consolidate claim extraction

* Consolidate graph extractor

* Move graph utils

* Move summarizers

* Semver

---------

Co-authored-by: Alonso Guevara <alonsog@microsoft.com>

* Fix syntax typo

---------

Co-authored-by: Alonso Guevara <alonsog@microsoft.com>

.semversioner/next-release/patch-20241212190223784600.json

@@ -0,0 +1,4 @@
+{
+  "type": "patch",
+  "description": "Streamline flows."
+}

graphrag/index/flows/compute_communities.py

@@ -9,15 +9,11 @@
 
 from graphrag.index.operations.cluster_graph import cluster_graph
 from graphrag.index.operations.create_graph import create_graph
-from graphrag.index.operations.snapshot import snapshot
-from graphrag.storage.pipeline_storage import PipelineStorage
 
 
-async def compute_communities(
+def compute_communities(
     base_relationship_edges: pd.DataFrame,
-    storage: PipelineStorage,
     clustering_strategy: dict[str, Any],
-    snapshot_transient_enabled: bool = False,
 ) -> pd.DataFrame:
     """All the steps to create the base entity graph."""
     graph = create_graph(base_relationship_edges)
@@ -32,12 +28,4 @@ async def compute_communities(
     ).explode("title")
     base_communities["community"] = base_communities["community"].astype(int)
 
-    if snapshot_transient_enabled:
-        await snapshot(
-            base_communities,
-            name="base_communities",
-            storage=storage,
-            formats=["parquet"],
-        )
-
     return base_communities

graphrag/index/flows/create_base_text_units.py

@@ -15,18 +15,14 @@
 )
 
 from graphrag.index.operations.chunk_text import chunk_text
-from graphrag.index.operations.snapshot import snapshot
 from graphrag.index.utils.hashing import gen_sha512_hash
-from graphrag.storage.pipeline_storage import PipelineStorage
 
 
-async def create_base_text_units(
+def create_base_text_units(
     documents: pd.DataFrame,
     callbacks: VerbCallbacks,
-    storage: PipelineStorage,
     chunk_by_columns: list[str],
     chunk_strategy: dict[str, Any] | None = None,
-    snapshot_transient_enabled: bool = False,
 ) -> pd.DataFrame:
     """All the steps to transform base text_units."""
     sort = documents.sort_values(by=["id"], ascending=[True])
@@ -74,19 +70,7 @@ async def create_base_text_units(
     # rename for downstream consumption
     chunked.rename(columns={"chunk": "text"}, inplace=True)
 
-    output = cast(
-        "pd.DataFrame", chunked[chunked["text"].notna()].reset_index(drop=True)
-    )
-
-    if snapshot_transient_enabled:
-        await snapshot(
-            output,
-            name="create_base_text_units",
-            storage=storage,
-            formats=["parquet"],
-        )
-
-    return output
+    return cast("pd.DataFrame", chunked[chunked["text"].notna()].reset_index(drop=True))
 
 
 # TODO: would be nice to inline this completely in the main method with pandas

graphrag/index/flows/create_final_nodes.py

@@ -10,6 +10,7 @@
     VerbCallbacks,
 )
 
+from graphrag.index.operations.compute_degree import compute_degree
 from graphrag.index.operations.create_graph import create_graph
 from graphrag.index.operations.embed_graph.embed_graph import embed_graph
 from graphrag.index.operations.layout_graph.layout_graph import layout_graph
@@ -37,15 +38,19 @@ def create_final_nodes(
         layout_strategy,
         embeddings=graph_embeddings,
     )
-    nodes = base_entity_nodes.merge(
-        layout, left_on="title", right_on="label", how="left"
-    )
 
-    joined = nodes.merge(base_communities, on="title", how="left")
-    joined["level"] = joined["level"].fillna(0).astype(int)
-    joined["community"] = joined["community"].fillna(-1).astype(int)
+    degrees = compute_degree(graph)
 
-    return joined.loc[
+    nodes = (
+        base_entity_nodes.merge(layout, left_on="title", right_on="label", how="left")
+        .merge(degrees, on="title", how="left")
+        .merge(base_communities, on="title", how="left")
+    )
+    nodes["level"] = nodes["level"].fillna(0).astype(int)
+    nodes["community"] = nodes["community"].fillna(-1).astype(int)
+    # disconnected nodes and those with no community even at level 0 can be missing degree
+    nodes["degree"] = nodes["degree"].fillna(0).astype(int)
+    return nodes.loc[
         :,
         [
             "id",

graphrag/index/flows/create_final_relationships.py

@@ -5,20 +5,25 @@
 
 import pandas as pd
 
+from graphrag.index.operations.compute_degree import compute_degree
 from graphrag.index.operations.compute_edge_combined_degree import (
     compute_edge_combined_degree,
 )
+from graphrag.index.operations.create_graph import create_graph
 
 
 def create_final_relationships(
     base_relationship_edges: pd.DataFrame,
-    base_entity_nodes: pd.DataFrame,
 ) -> pd.DataFrame:
     """All the steps to transform final relationships."""
     relationships = base_relationship_edges
+
+    graph = create_graph(base_relationship_edges)
+    degrees = compute_degree(graph)
+
     relationships["combined_degree"] = compute_edge_combined_degree(
         relationships,
-        base_entity_nodes,
+        degrees,
         node_name_column="title",
         node_degree_column="degree",
         edge_source_column="source",

graphrag/index/flows/extract_graph.py

@@ -6,41 +6,33 @@
 from typing import Any
 from uuid import uuid4
 
-import networkx as nx
 import pandas as pd
 from datashaper import (
     AsyncType,
     VerbCallbacks,
 )
 
 from graphrag.cache.pipeline_cache import PipelineCache
-from graphrag.index.operations.create_graph import create_graph
 from graphrag.index.operations.extract_entities import extract_entities
-from graphrag.index.operations.snapshot import snapshot
-from graphrag.index.operations.snapshot_graphml import snapshot_graphml
 from graphrag.index.operations.summarize_descriptions import (
     summarize_descriptions,
 )
-from graphrag.storage.pipeline_storage import PipelineStorage
 
 
 async def extract_graph(
     text_units: pd.DataFrame,
     callbacks: VerbCallbacks,
     cache: PipelineCache,
-    storage: PipelineStorage,
     extraction_strategy: dict[str, Any] | None = None,
     extraction_num_threads: int = 4,
     extraction_async_mode: AsyncType = AsyncType.AsyncIO,
     entity_types: list[str] | None = None,
     summarization_strategy: dict[str, Any] | None = None,
     summarization_num_threads: int = 4,
-    snapshot_graphml_enabled: bool = False,
-    snapshot_transient_enabled: bool = False,
 ) -> tuple[pd.DataFrame, pd.DataFrame]:
     """All the steps to create the base entity graph."""
     # this returns a graph for each text unit, to be merged later
-    entity_dfs, relationship_dfs = await extract_entities(
+    entities, relationships = await extract_entities(
         text_units,
         callbacks,
         cache,
@@ -52,87 +44,38 @@ async def extract_graph(
         num_threads=extraction_num_threads,
     )
 
-    if not _validate_data(entity_dfs):
+    if not _validate_data(entities):
         error_msg = "Entity Extraction failed. No entities detected during extraction."
         callbacks.error(error_msg)
         raise ValueError(error_msg)
 
-    if not _validate_data(relationship_dfs):
+    if not _validate_data(relationships):
         error_msg = (
             "Entity Extraction failed. No relationships detected during extraction."
         )
         callbacks.error(error_msg)
         raise ValueError(error_msg)
 
-    merged_entities = _merge_entities(entity_dfs)
-    merged_relationships = _merge_relationships(relationship_dfs)
-
     entity_summaries, relationship_summaries = await summarize_descriptions(
-        merged_entities,
-        merged_relationships,
+        entities,
+        relationships,
         callbacks,
         cache,
         strategy=summarization_strategy,
         num_threads=summarization_num_threads,
     )
 
-    base_relationship_edges = _prep_edges(merged_relationships, relationship_summaries)
-
-    graph = create_graph(base_relationship_edges)
-
-    base_entity_nodes = _prep_nodes(merged_entities, entity_summaries, graph)
-
-    if snapshot_graphml_enabled:
-        # todo: extract graphs at each level, and add in meta like descriptions
-        await snapshot_graphml(
-            graph,
-            name="graph",
-            storage=storage,
-        )
+    base_relationship_edges = _prep_edges(relationships, relationship_summaries)
 
-    if snapshot_transient_enabled:
-        await snapshot(
-            base_entity_nodes,
-            name="base_entity_nodes",
-            storage=storage,
-            formats=["parquet"],
-        )
-        await snapshot(
-            base_relationship_edges,
-            name="base_relationship_edges",
-            storage=storage,
-            formats=["parquet"],
-        )
+    base_entity_nodes = _prep_nodes(entities, entity_summaries)
 
     return (base_entity_nodes, base_relationship_edges)
 
 
-def _merge_entities(entity_dfs) -> pd.DataFrame:
-    all_entities = pd.concat(entity_dfs, ignore_index=True)
-    return (
-        all_entities.groupby(["name", "type"], sort=False)
-        .agg({"description": list, "source_id": list})
-        .reset_index()
-    )
-
-
-def _merge_relationships(relationship_dfs) -> pd.DataFrame:
-    all_relationships = pd.concat(relationship_dfs, ignore_index=False)
-    return (
-        all_relationships.groupby(["source", "target"], sort=False)
-        .agg({"description": list, "source_id": list, "weight": "sum"})
-        .reset_index()
-    )
-
-
-def _prep_nodes(entities, summaries, graph) -> pd.DataFrame:
-    degrees_df = _compute_degree(graph)
+def _prep_nodes(entities, summaries) -> pd.DataFrame:
     entities.drop(columns=["description"], inplace=True)
-    nodes = (
-        entities.merge(summaries, on="name", how="left")
-        .merge(degrees_df, on="name")
-        .drop_duplicates(subset="name")
-        .rename(columns={"name": "title", "source_id": "text_unit_ids"})
+    nodes = entities.merge(summaries, on="title", how="left").drop_duplicates(
+        subset="title"
     )
     nodes = nodes.loc[nodes["title"].notna()].reset_index()
     nodes["human_readable_id"] = nodes.index
@@ -145,22 +88,12 @@ def _prep_edges(relationships, summaries) -> pd.DataFrame:
         relationships.drop(columns=["description"])
         .drop_duplicates(subset=["source", "target"])
         .merge(summaries, on=["source", "target"], how="left")
-        .rename(columns={"source_id": "text_unit_ids"})
     )
     edges["human_readable_id"] = edges.index
     edges["id"] = edges["human_readable_id"].apply(lambda _x: str(uuid4()))
     return edges
 
 
-def _compute_degree(graph: nx.Graph) -> pd.DataFrame:
-    return pd.DataFrame([
-        {"name": node, "degree": int(degree)}
-        for node, degree in graph.degree  # type: ignore
-    ])
-
-
-def _validate_data(df_list: list[pd.DataFrame]) -> bool:
-    """Validate that the dataframe list is valid. At least one dataframe must contain data."""
-    return any(
-        len(df) > 0 for df in df_list
-    )  # Check for len, not .empty, as the dfs have schemas in some cases
+def _validate_data(df: pd.DataFrame) -> bool:
+    """Validate that the dataframe has data."""
+    return len(df) > 0

graphrag/index/flows/generate_text_embeddings.py

@@ -129,9 +129,8 @@ async def _run_and_snapshot_embeddings(
             strategy=text_embed_config["strategy"],
         )
 
-        data = data.loc[:, ["id", "embedding"]]
-
         if snapshot_embeddings_enabled is True:
+            data = data.loc[:, ["id", "embedding"]]
             await snapshot(
                 data,
                 name=f"embeddings.{name}",

graphrag/index/operations/compute_degree.py

@@ -0,0 +1,15 @@
+# Copyright (c) 2024 Microsoft Corporation.
+# Licensed under the MIT License
+
+"""A module containing create_graph definition."""
+
+import networkx as nx
+import pandas as pd
+
+
+def compute_degree(graph: nx.Graph) -> pd.DataFrame:
+    """Create a new DataFrame with the degree of each node in the graph."""
+    return pd.DataFrame([
+        {"title": node, "degree": int(degree)}
+        for node, degree in graph.degree  # type: ignore
+    ])

graphrag/index/operations/extract_entities/extract_entities.py

@@ -37,7 +37,7 @@ async def extract_entities(
     async_mode: AsyncType = AsyncType.AsyncIO,
     entity_types=DEFAULT_ENTITY_TYPES,
     num_threads: int = 4,
-) -> tuple[list[pd.DataFrame], list[pd.DataFrame]]:
+) -> tuple[pd.DataFrame, pd.DataFrame]:
     """
     Extract entities from a piece of text.
 
@@ -138,7 +138,10 @@ async def run_strategy(row):
             entity_dfs.append(pd.DataFrame(result[0]))
             relationship_dfs.append(pd.DataFrame(result[1]))
 
-    return (entity_dfs, relationship_dfs)
+    entities = _merge_entities(entity_dfs)
+    relationships = _merge_relationships(relationship_dfs)
+
+    return (entities, relationships)
 
 
 def _load_strategy(strategy_type: ExtractEntityStrategyType) -> EntityExtractStrategy:
@@ -162,3 +165,25 @@ def _load_strategy(strategy_type: ExtractEntityStrategyType) -> EntityExtractStr
         case _:
             msg = f"Unknown strategy: {strategy_type}"
             raise ValueError(msg)
+
+
+def _merge_entities(entity_dfs) -> pd.DataFrame:
+    all_entities = pd.concat(entity_dfs, ignore_index=True)
+    return (
+        all_entities.groupby(["title", "type"], sort=False)
+        .agg(description=("description", list), text_unit_ids=("source_id", list))
+        .reset_index()
+    )
+
+
+def _merge_relationships(relationship_dfs) -> pd.DataFrame:
+    all_relationships = pd.concat(relationship_dfs, ignore_index=False)
+    return (
+        all_relationships.groupby(["source", "target"], sort=False)
+        .agg(
+            description=("description", list),
+            text_unit_ids=("source_id", list),
+            weight=("weight", "sum"),
+        )
+        .reset_index()
+    )

graphrag/index/operations/extract_entities/graph_intelligence_strategy.py

@@ -106,7 +106,7 @@ async def run_extract_entities(
             )
 
     entities = [
-        ({"name": item[0], **(item[1] or {})})
+        ({"title": item[0], **(item[1] or {})})
         for item in graph.nodes(data=True)
         if item is not None
     ]

graphrag/index/operations/extract_entities/nltk_strategy.py

@@ -58,7 +58,7 @@ async def run(  # noqa RUF029 async is required for interface
 
     return EntityExtractionResult(
         entities=[
-            {"type": entity_type, "name": name}
+            {"type": entity_type, "title": name}
             for name, entity_type in entity_map.items()
         ],
         relationships=[],