style: format code with black

Author: chalmerlowe

samples/insert_data_sample.py

@@ -20,6 +20,7 @@
 from sample_helper import run_sample
 from model import Singer, Album, Track
 
+
 # Shows how to insert data using SQLAlchemy, including relationships that are
 # defined both as foreign keys and as interleaved tables.
 def insert_data():

samples/insert_or_ignore_sample.py

@@ -21,6 +21,7 @@
 from sample_helper import run_sample
 from model import Singer
 
+
 # Shows how to use insert-or-ignore using SQLAlchemy and Spanner.
 def insert_or_ignore_sample():
     engine = create_engine(

samples/insert_or_update_sample.py

@@ -21,6 +21,7 @@
 from sample_helper import run_sample
 from model import Singer
 
+
 # Shows how to use insert-or-update using SQLAlchemy and Spanner.
 def insert_or_update_sample():
     engine = create_engine(

samples/interleaved_table_sample.py

@@ -20,6 +20,7 @@
 from sample_helper import run_sample
 from model import Singer, Album, Track
 
+
 # Shows how INTERLEAVE IN PARENT can be used in SQLAlchemy.
 # INTERLEAVE IN PARENT can be modelled as if it were a normal relationship
 # in SQLAlchemy. SQLAlchemy can also generate the correct DDL for this.

samples/parse_json_sample.py

@@ -18,6 +18,7 @@
 from sample_helper import run_sample
 from model import Venue
 
+
 # Shows how to use the PARSE_JSON function in Spanner using SQLAlchemy.
 def parse_json_sample():
     engine = create_engine(

samples/partitioned_dml_sample.py

@@ -17,6 +17,7 @@
 
 from sample_helper import run_sample
 
+
 # Shows how to use Partitioned DML using SQLAlchemy and Spanner.
 def partitioned_dml_sample():
     engine = create_engine(

samples/pickle_type_sample.py

@@ -20,6 +20,7 @@
 from sample_helper import run_sample
 from model import Singer
 
+
 # Shows how to use PickleType with Spanner.
 def pickle_type():
     engine = create_engine(