chore: Apply non-functional refactoring and fix typos

Author: edgarrmondragon

pyproject.toml

@@ -79,14 +79,22 @@ target-version = "py38"
 
 [tool.ruff.lint]
 select = [
-  "F",   # Pyflakes
-  "W",   # pycodestyle warnings
-  "E",   # pycodestyle errors
-  "I",   # isort
-  "N",   # pep8-naming
-  "D",   # pydocsyle
-  "ICN", # flake8-import-conventions
-  "RUF", # ruff
+  "F",    # Pyflakes
+  "W",    # pycodestyle warnings
+  "E",    # pycodestyle errors
+  "I",    # isort
+  "N",    # pep8-naming
+  "D",    # pydocsyle
+  "UP",   # pyupgrade
+  "ICN",  # flake8-import-conventions
+  "RET",  # flake8-return
+  "SIM",  # flake8-simplify
+  "TCH",  # flake8-type-checking
+  "ERA",  # eradicate
+  "PGH",  # pygrep-hooks
+  "PL",   # Pylint
+  "PERF", # Perflint
+  "RUF",  # ruff
 ]
 
 [tool.ruff.lint.flake8-import-conventions]

target_postgres/connector.py

@@ -1,10 +1,13 @@
 """Handles Postgres interactions."""
 
+
 from __future__ import annotations
 
 import atexit
 import io
+import itertools
 import signal
+import sys
 import typing as t
 from contextlib import contextmanager
 from os import chmod, path
@@ -79,7 +82,7 @@ def __init__(self, config: dict) -> None:
             sqlalchemy_url=url.render_as_string(hide_password=False),
         )
 
-    def prepare_table(  # type: ignore[override]
+    def prepare_table(  # type: ignore[override]  # noqa: PLR0913
         self,
         full_table_name: str,
         schema: dict,
@@ -105,7 +108,7 @@ def prepare_table(  # type: ignore[override]
         meta = sa.MetaData(schema=schema_name)
         table: sa.Table
         if not self.table_exists(full_table_name=full_table_name):
-            table = self.create_empty_table(
+            return self.create_empty_table(
                 table_name=table_name,
                 meta=meta,
                 schema=schema,
@@ -114,7 +117,6 @@ def prepare_table(  # type: ignore[override]
                 as_temp_table=as_temp_table,
                 connection=connection,
             )
-            return table
         meta.reflect(connection, only=[table_name])
         table = meta.tables[
             full_table_name
@@ -161,19 +163,19 @@ def copy_table_structure(
         _, schema_name, table_name = self.parse_full_table_name(full_table_name)
         meta = sa.MetaData(schema=schema_name)
         new_table: sa.Table
-        columns = []
         if self.table_exists(full_table_name=full_table_name):
             raise RuntimeError("Table already exists")
-        for column in from_table.columns:
-            columns.append(column._copy())
+
+        columns = [column._copy() for column in from_table.columns]
+
         if as_temp_table:
             new_table = sa.Table(table_name, meta, *columns, prefixes=["TEMPORARY"])
             new_table.create(bind=connection)
             return new_table
-        else:
-            new_table = sa.Table(table_name, meta, *columns)
-            new_table.create(bind=connection)
-            return new_table
+
+        new_table = sa.Table(table_name, meta, *columns)
+        new_table.create(bind=connection)
+        return new_table
 
     @contextmanager
     def _connect(self) -> t.Iterator[sa.engine.Connection]:
@@ -184,18 +186,17 @@ def drop_table(self, table: sa.Table, connection: sa.engine.Connection):
         """Drop table data."""
         table.drop(bind=connection)
 
-    def clone_table(
+    def clone_table(  # noqa: PLR0913
         self, new_table_name, table, metadata, connection, temp_table
     ) -> sa.Table:
         """Clone a table."""
-        new_columns = []
-        for column in table.columns:
-            new_columns.append(
-                sa.Column(
-                    column.name,
-                    column.type,
-                )
+        new_columns = [
+            sa.Column(
+                column.name,
+                column.type,
             )
+            for column in table.columns
+        ]
         if temp_table is True:
             new_table = sa.Table(
                 new_table_name, metadata, *new_columns, prefixes=["TEMPORARY"]
@@ -275,9 +276,8 @@ def pick_individual_type(jsonschema_type: dict):
         if jsonschema_type.get("format") == "date-time":
             return TIMESTAMP()
         individual_type = th.to_sql_type(jsonschema_type)
-        if isinstance(individual_type, VARCHAR):
-            return TEXT()
-        return individual_type
+
+        return TEXT() if isinstance(individual_type, VARCHAR) else individual_type
 
     @staticmethod
     def pick_best_sql_type(sql_type_array: list):
@@ -304,13 +304,12 @@ def pick_best_sql_type(sql_type_array: list):
             NOTYPE,
         ]
 
-        for sql_type in precedence_order:
-            for obj in sql_type_array:
-                if isinstance(obj, sql_type):
-                    return obj
+        for sql_type, obj in itertools.product(precedence_order, sql_type_array):
+            if isinstance(obj, sql_type):
+                return obj
         return TEXT()
 
-    def create_empty_table(  # type: ignore[override]
+    def create_empty_table(  # type: ignore[override]  # noqa: PLR0913
         self,
         table_name: str,
         meta: sa.MetaData,
@@ -324,7 +323,7 @@ def create_empty_table(  # type: ignore[override]
 
         Args:
             table_name: the target table name.
-            meta: the SQLAchemy metadata object.
+            meta: the SQLAlchemy metadata object.
             schema: the JSON schema for the new table.
             connection: the database connection.
             primary_keys: list of key properties.
@@ -367,7 +366,7 @@ def create_empty_table(  # type: ignore[override]
         new_table.create(bind=connection)
         return new_table
 
-    def prepare_column(
+    def prepare_column(  # noqa: PLR0913
         self,
         full_table_name: str,
         column_name: str,
@@ -415,7 +414,7 @@ def prepare_column(
             column_object=column_object,
         )
 
-    def _create_empty_column(  # type: ignore[override]
+    def _create_empty_column(  # type: ignore[override]  # noqa: PLR0913
         self,
         schema_name: str,
         table_name: str,
@@ -480,7 +479,7 @@ def get_column_add_ddl(  # type: ignore[override]
             },
         )
 
-    def _adapt_column_type(  # type: ignore[override]
+    def _adapt_column_type(  # type: ignore[override]  # noqa: PLR0913
         self,
         schema_name: str,
         table_name: str,
@@ -523,7 +522,7 @@ def _adapt_column_type(  # type: ignore[override]
             return
 
         # Not the same type, generic type or compatible types
-        # calling merge_sql_types for assistnace
+        # calling merge_sql_types for assistance
         compatible_sql_type = self.merge_sql_types([current_type, sql_type])
 
         if str(compatible_sql_type) == str(current_type):
@@ -593,17 +592,16 @@ def get_sqlalchemy_url(self, config: dict) -> str:
         if config.get("sqlalchemy_url"):
             return cast(str, config["sqlalchemy_url"])
 
-        else:
-            sqlalchemy_url = URL.create(
-                drivername=config["dialect+driver"],
-                username=config["user"],
-                password=config["password"],
-                host=config["host"],
-                port=config["port"],
-                database=config["database"],
-                query=self.get_sqlalchemy_query(config),
-            )
-            return cast(str, sqlalchemy_url)
+        sqlalchemy_url = URL.create(
+            drivername=config["dialect+driver"],
+            username=config["user"],
+            password=config["password"],
+            host=config["host"],
+            port=config["port"],
+            database=config["database"],
+            query=self.get_sqlalchemy_query(config),
+        )
+        return cast(str, sqlalchemy_url)
 
     def get_sqlalchemy_query(self, config: dict) -> dict:
         """Get query values to be used for sqlalchemy URL creation.
@@ -619,7 +617,7 @@ def get_sqlalchemy_query(self, config: dict) -> dict:
         # ssl_enable is for verifying the server's identity to the client.
         if config["ssl_enable"]:
             ssl_mode = config["ssl_mode"]
-            query.update({"sslmode": ssl_mode})
+            query["sslmode"] = ssl_mode
             query["sslrootcert"] = self.filepath_or_certificate(
                 value=config["ssl_certificate_authority"],
                 alternative_name=config["ssl_storage_directory"] + "/root.crt",
@@ -665,12 +663,11 @@ def filepath_or_certificate(
         """
         if path.isfile(value):
             return value
-        else:
-            with open(alternative_name, "wb") as alternative_file:
-                alternative_file.write(value.encode("utf-8"))
-            if restrict_permissions:
-                chmod(alternative_name, 0o600)
-            return alternative_name
+        with open(alternative_name, "wb") as alternative_file:
+            alternative_file.write(value.encode("utf-8"))
+        if restrict_permissions:
+            chmod(alternative_name, 0o600)
+        return alternative_name
 
     def guess_key_type(self, key_data: str) -> paramiko.PKey:
         """Guess the type of the private key.
@@ -695,7 +692,7 @@ def guess_key_type(self, key_data: str) -> paramiko.PKey:
         ):
             try:
                 key = key_class.from_private_key(io.StringIO(key_data))  # type: ignore[attr-defined]
-            except paramiko.SSHException:
+            except paramiko.SSHException:  # noqa: PERF203
                 continue
             else:
                 return key
@@ -715,7 +712,7 @@ def catch_signal(self, signum, frame) -> None:
             signum: The signal number
             frame: The current stack frame
         """
-        exit(1)  # Calling this to be sure atexit is called, so clean_up gets called
+        sys.exit(1)  # Calling this to be sure atexit is called, so clean_up gets called
 
     def _get_column_type(  # type: ignore[override]
         self,

target_postgres/sinks.py

@@ -47,10 +47,7 @@ def setup(self) -> None:
         This method is called on Sink creation, and creates the required Schema and
         Table entities in the target database.
         """
-        if self.key_properties is None or self.key_properties == []:
-            self.append_only = True
-        else:
-            self.append_only = False
+        self.append_only = self.key_properties is None or self.key_properties == []
         if self.schema_name:
             self.connector.prepare_schema(self.schema_name)
         with self.connector._connect() as connection, connection.begin():
@@ -109,14 +106,14 @@ def process_batch(self, context: dict) -> None:
 
     def generate_temp_table_name(self):
         """Uuid temp table name."""
-        # sa.exc.IdentifierError: Identifier
+        # sa.exc.IdentifierError: Identifier  # noqa: ERA001
         # 'temp_test_optional_attributes_388470e9_fbd0_47b7_a52f_d32a2ee3f5f6'
         # exceeds maximum length of 63 characters
         # Is hit if we have a long table name, there is no limit on Temporary tables
         # in postgres, used a guid just in case we are using the same session
         return f"{str(uuid.uuid4()).replace('-', '_')}"
 
-    def bulk_insert_records(  # type: ignore[override]
+    def bulk_insert_records(  # type: ignore[override]  # noqa: PLR0913
         self,
         table: sa.Table,
         schema: dict,
@@ -156,24 +153,24 @@ def bulk_insert_records(  # type: ignore[override]
         if self.append_only is False:
             insert_records: Dict[str, Dict] = {}  # pk : record
             for record in records:
-                insert_record = {}
-                for column in columns:
-                    insert_record[column.name] = record.get(column.name)
+                insert_record = {
+                    column.name: record.get(column.name) for column in columns
+                }
                 # No need to check for a KeyError here because the SDK already
-                # guaruntees that all key properties exist in the record.
+                # guarantees that all key properties exist in the record.
                 primary_key_value = "".join([str(record[key]) for key in primary_keys])
                 insert_records[primary_key_value] = insert_record
             data_to_insert = list(insert_records.values())
         else:
             for record in records:
-                insert_record = {}
-                for column in columns:
-                    insert_record[column.name] = record.get(column.name)
+                insert_record = {
+                    column.name: record.get(column.name) for column in columns
+                }
                 data_to_insert.append(insert_record)
         connection.execute(insert, data_to_insert)
         return True
 
-    def upsert(
+    def upsert(  # noqa: PLR0913
         self,
         from_table: sa.Table,
         to_table: sa.Table,
@@ -232,7 +229,7 @@ def upsert(
             # Update
             where_condition = join_condition
             update_columns = {}
-            for column_name in self.schema["properties"].keys():
+            for column_name in self.schema["properties"]:
                 from_table_column: sa.Column = from_table.columns[column_name]
                 to_table_column: sa.Column = to_table.columns[column_name]
                 update_columns[to_table_column] = from_table_column
@@ -249,14 +246,13 @@ def column_representation(
         schema: dict,
     ) -> List[sa.Column]:
         """Return a sqlalchemy table representation for the current schema."""
-        columns: list[sa.Column] = []
-        for property_name, property_jsonschema in schema["properties"].items():
-            columns.append(
-                sa.Column(
-                    property_name,
-                    self.connector.to_sql_type(property_jsonschema),
-                )
+        columns: list[sa.Column] = [
+            sa.Column(
+                property_name,
+                self.connector.to_sql_type(property_jsonschema),
             )
+            for property_name, property_jsonschema in schema["properties"].items()
+        ]
         return columns
 
     def generate_insert_statement(
@@ -286,12 +282,12 @@ def schema_name(self) -> Optional[str]:
         """Return the schema name or `None` if using names with no schema part.
 
                 Note that after the next SDK release (after 0.14.0) we can remove this
-                as it's already upstreamed.
+                as it's already up-streamed.
 
         Returns:
             The target schema name.
         """
-        # Look for a default_target_scheme in the configuraion fle
+        # Look for a default_target_scheme in the configuration file
         default_target_schema: str = self.config.get("default_target_schema", None)
         parts = self.stream_name.split("-")
 
@@ -302,14 +298,7 @@ def schema_name(self) -> Optional[str]:
         if default_target_schema:
             return default_target_schema
 
-        if len(parts) in {2, 3}:
-            # Stream name is a two-part or three-part identifier.
-            # Use the second-to-last part as the schema name.
-            stream_schema = self.conform_name(parts[-2], "schema")
-            return stream_schema
-
-        # Schema name not detected.
-        return None
+        return self.conform_name(parts[-2], "schema") if len(parts) in {2, 3} else None
 
     def activate_version(self, new_version: int) -> None:
         """Bump the active version of the target table.