Fixes lineage linting (#7956)

* Fixed pylint

* Fixed python formating

ingestion/src/metadata/ingestion/lineage/parser.py

@@ -24,6 +24,7 @@ from metadata.utils.logger import ingestion_logger
 
 # Prevent sqllineage from modifying the logger config
 # Disable the DictConfigurator.configure method while importing LineageRunner
+# pylint: disable=wrong-import-position
 configure = DictConfigurator.configure
 DictConfigurator.configure = lambda _: None
 from sqllineage.core import models
@@ -36,7 +37,9 @@ DictConfigurator.configure = configure
 logger = ingestion_logger()
 
 
-def get_involved_tables_from_parser(parser: LineageRunner) -> List[models.Table]:
+def get_involved_tables_from_parser(
+    parser: LineageRunner,
+) -> Optional[List[models.Table]]:
     """
     Use the LineageRunner parser and combine
     source and intermediate tables into
@@ -56,6 +59,7 @@ def get_involved_tables_from_parser(parser: LineageRunner) -> List[models.Table]
         logger.warning(
             f"Cannot extract source table information from query [{parser._sql}]: {exc}"  # pylint: disable=protected-access
         )
+        return None
 
 
 def get_clean_parser_table_list(tables: List[models.Table]) -> List[str]:

ingestion/src/metadata/ingestion/lineage/sql_lineage.py

@@ -35,7 +35,9 @@ LRU_CACHE_SIZE = 4096
 def split_raw_table_name(database: str, raw_name: str) -> dict:
     database_schema = None
     if "." in raw_name:
-        database_schema, table = fqn.split(raw_name)[-2:]
+        database_schema, table = fqn.split(raw_name)[
+            -2:
+        ]  # pylint: disable=unbalanced-tuple-unpacking
         if database_schema == "<default>":
             database_schema = None
     return {"database": database, "database_schema": database_schema, "table": table}
@@ -46,11 +48,13 @@ def get_column_fqn(table_entity: Table, column: str) -> Optional[str]:
     Get fqn of column if exist in table entity
     """
     if not table_entity:
-        return
+        return None
     for tbl_column in table_entity.columns:
         if column.lower() == tbl_column.name.__root__.lower():
             return tbl_column.fullyQualifiedName.__root__
 
+    return None
+
 
 search_cache = LRUCache(LRU_CACHE_SIZE)
 
@@ -70,7 +74,6 @@ def search_table_entities(
     search_tuple = (service_name, database, database_schema, table)
     if search_tuple in search_cache:
         return search_cache.get(search_tuple)
-    else:
     try:
         table_fqns = fqn.build(
             metadata,
@@ -93,6 +96,7 @@ def search_table_entities(
         logger.error(
             f"Error searching for table entities for service [{service_name}]: {exc}"
         )
+        return None
 
 
 def get_table_entities_from_query(
@@ -101,7 +105,7 @@ def get_table_entities_from_query(
     database_name: str,
     database_schema: str,
     table_name: str,
-) -> List[Table]:
+) -> Optional[List[Table]]:
     """
     Fetch data from API and ES with a fallback strategy.
 
@@ -148,6 +152,8 @@ def get_table_entities_from_query(
     if table_entities:
         return table_entities
 
+    return None
+
 
 def get_column_lineage(
     to_entity: Table,
@@ -156,6 +162,18 @@ def get_column_lineage(
     from_table_raw_name: str,
     column_lineage_map: dict,
 ) -> List[ColumnLineage]:
+    """Get column lineage
+
+    Args:
+        to_entity (Table): entity to link to
+        from_entity (Table): entity link comes from
+        to_table_raw_name (str): table entity raw name we link to
+        from_table_raw_name (str): table entity raw name we link from
+        column_lineage_map (dict): map of the column lineage
+
+    Returns:
+        List[ColumnLineage]
+    """
     column_lineage = []
     if column_lineage_map.get(to_table_raw_name) and column_lineage_map.get(
         to_table_raw_name
@@ -211,6 +229,7 @@ def _build_table_lineage(
         yield lineage
 
 
+# pylint: disable=too-many-arguments
 def _create_lineage_by_table_name(
     metadata: OpenMetadata,
     from_table: str,
@@ -261,11 +280,16 @@ def _create_lineage_by_table_name(
 
 
 def populate_column_lineage_map(raw_column_lineage):
+    """populate column lineage map
+
+    Args:
+        raw_column_lineage (_type_): raw column lineage
+    """
     lineage_map = {}
     if not raw_column_lineage or len(raw_column_lineage[0]) != 2:
         return lineage_map
     for source, target in raw_column_lineage:
-        for parent in source._parent:
+        for parent in source._parent:  # pylint: disable=protected-access
             if lineage_map.get(str(target.parent)):
                 ele = lineage_map.get(str(target.parent))
                 if ele.get(str(parent)):
@@ -299,7 +323,9 @@ def get_lineage_by_query(
     # Disable the DictConfigurator.configure method while importing LineageRunner
     configure = DictConfigurator.configure
     DictConfigurator.configure = lambda _: None
-    from sqllineage.runner import LineageRunner
+    from sqllineage.runner import (
+        LineageRunner,  # pylint: disable=import-outside-toplevel
+    )
 
     # Reverting changes after import is done
     DictConfigurator.configure = configure
@@ -361,11 +387,29 @@ def get_lineage_via_table_entity(
     service_name: str,
     query: str,
 ) -> Optional[Iterator[AddLineageRequest]]:
+    """Get lineage from table entity
+
+    Args:
+        metadata (OpenMetadata): OM Server client Object
+        table_entity (Table): table entity
+        database_name (str): name of the database
+        schema_name (str): name of the schema
+        service_name (str): name of the service
+        query (str): query used for lineage
+
+    Returns:
+        Optional[Iterator[AddLineageRequest]]
+
+    Yields:
+        Iterator[Optional[Iterator[AddLineageRequest]]]
+    """
     # Prevent sqllineage from modifying the logger config
     # Disable the DictConfigurator.configure method while importing LineageRunner
     configure = DictConfigurator.configure
     DictConfigurator.configure = lambda _: None
-    from sqllineage.runner import LineageRunner
+    from sqllineage.runner import (
+        LineageRunner,  # pylint: disable=import-outside-toplevel
+    )
 
     # Reverting changes after import is done
     DictConfigurator.configure = configure