Reformatted all the files using black (#448)

Reformatted the files using black

examples/custom_cred_provider.py

@@ -4,23 +4,27 @@
 from databricks.sdk.oauth import OAuthClient
 import os
 
-oauth_client = OAuthClient(host=os.getenv("DATABRICKS_SERVER_HOSTNAME"),
-                           client_id=os.getenv("DATABRICKS_CLIENT_ID"),
-                           client_secret=os.getenv("DATABRICKS_CLIENT_SECRET"),
-                           redirect_url=os.getenv("APP_REDIRECT_URL"),
-                           scopes=['all-apis', 'offline_access'])
+oauth_client = OAuthClient(
+    host=os.getenv("DATABRICKS_SERVER_HOSTNAME"),
+    client_id=os.getenv("DATABRICKS_CLIENT_ID"),
+    client_secret=os.getenv("DATABRICKS_CLIENT_SECRET"),
+    redirect_url=os.getenv("APP_REDIRECT_URL"),
+    scopes=["all-apis", "offline_access"],
+)
 
 consent = oauth_client.initiate_consent()
 
 creds = consent.launch_external_browser()
 
-with sql.connect(server_hostname = os.getenv("DATABRICKS_SERVER_HOSTNAME"),
-                 http_path       = os.getenv("DATABRICKS_HTTP_PATH"),
-                 credentials_provider=creds) as connection:
+with sql.connect(
+    server_hostname=os.getenv("DATABRICKS_SERVER_HOSTNAME"),
+    http_path=os.getenv("DATABRICKS_HTTP_PATH"),
+    credentials_provider=creds,
+) as connection:
 
     for x in range(1, 5):
         cursor = connection.cursor()
-        cursor.execute('SELECT 1+1')
+        cursor.execute("SELECT 1+1")
         result = cursor.fetchall()
         for row in result:
             print(row)

examples/insert_data.py

@@ -1,21 +1,23 @@
 from databricks import sql
 import os
 
-with sql.connect(server_hostname = os.getenv("DATABRICKS_SERVER_HOSTNAME"),
-                 http_path       = os.getenv("DATABRICKS_HTTP_PATH"),
-                 access_token    = os.getenv("DATABRICKS_TOKEN")) as connection:
+with sql.connect(
+    server_hostname=os.getenv("DATABRICKS_SERVER_HOSTNAME"),
+    http_path=os.getenv("DATABRICKS_HTTP_PATH"),
+    access_token=os.getenv("DATABRICKS_TOKEN"),
+) as connection:
 
-  with connection.cursor() as cursor:
-    cursor.execute("CREATE TABLE IF NOT EXISTS squares (x int, x_squared int)")
+    with connection.cursor() as cursor:
+        cursor.execute("CREATE TABLE IF NOT EXISTS squares (x int, x_squared int)")
 
-    squares = [(i, i * i) for i in range(100)]
-    values = ",".join([f"({x}, {y})" for (x, y) in squares])
+        squares = [(i, i * i) for i in range(100)]
+        values = ",".join([f"({x}, {y})" for (x, y) in squares])
 
-    cursor.execute(f"INSERT INTO squares VALUES {values}")
+        cursor.execute(f"INSERT INTO squares VALUES {values}")
 
-    cursor.execute("SELECT * FROM squares LIMIT 10")
+        cursor.execute("SELECT * FROM squares LIMIT 10")
 
-    result = cursor.fetchall()
+        result = cursor.fetchall()
 
-    for row in result:
-      print(row)
+        for row in result:
+            print(row)

examples/interactive_oauth.py

@@ -13,12 +13,14 @@
 token across script executions.
 """
 
-with sql.connect(server_hostname = os.getenv("DATABRICKS_SERVER_HOSTNAME"),
-                 http_path       = os.getenv("DATABRICKS_HTTP_PATH")) as connection:
+with sql.connect(
+    server_hostname=os.getenv("DATABRICKS_SERVER_HOSTNAME"),
+    http_path=os.getenv("DATABRICKS_HTTP_PATH"),
+) as connection:
 
     for x in range(1, 100):
         cursor = connection.cursor()
-        cursor.execute('SELECT 1+1')
+        cursor.execute("SELECT 1+1")
         result = cursor.fetchall()
         for row in result:
             print(row)

examples/m2m_oauth.py

@@ -22,17 +22,19 @@ def credential_provider():
         # Service Principal UUID
         client_id=os.getenv("DATABRICKS_CLIENT_ID"),
         # Service Principal Secret
-        client_secret=os.getenv("DATABRICKS_CLIENT_SECRET"))
+        client_secret=os.getenv("DATABRICKS_CLIENT_SECRET"),
+    )
     return oauth_service_principal(config)
 
 
 with sql.connect(
-        server_hostname=server_hostname,
-        http_path=os.getenv("DATABRICKS_HTTP_PATH"),
-        credentials_provider=credential_provider) as connection:
+    server_hostname=server_hostname,
+    http_path=os.getenv("DATABRICKS_HTTP_PATH"),
+    credentials_provider=credential_provider,
+) as connection:
     for x in range(1, 100):
         cursor = connection.cursor()
-        cursor.execute('SELECT 1+1')
+        cursor.execute("SELECT 1+1")
         result = cursor.fetchall()
         for row in result:
             print(row)

examples/persistent_oauth.py

@@ -17,37 +17,44 @@
 from typing import Optional
 
 from databricks import sql
-from databricks.sql.experimental.oauth_persistence import OAuthPersistence, OAuthToken, DevOnlyFilePersistence
+from databricks.sql.experimental.oauth_persistence import (
+    OAuthPersistence,
+    OAuthToken,
+    DevOnlyFilePersistence,
+)
 
 
 class SampleOAuthPersistence(OAuthPersistence):
-  def persist(self, hostname: str, oauth_token: OAuthToken):
-    """To be implemented by the end user to persist in the preferred storage medium.
+    def persist(self, hostname: str, oauth_token: OAuthToken):
+        """To be implemented by the end user to persist in the preferred storage medium.
 
-    OAuthToken has two properties:
-        1. OAuthToken.access_token
-        2. OAuthToken.refresh_token
+        OAuthToken has two properties:
+            1. OAuthToken.access_token
+            2. OAuthToken.refresh_token
 
-    Both should be persisted.
-    """
-    pass
+        Both should be persisted.
+        """
+        pass
 
-  def read(self, hostname: str) -> Optional[OAuthToken]:
-    """To be implemented by the end user to fetch token from the preferred storage
+    def read(self, hostname: str) -> Optional[OAuthToken]:
+        """To be implemented by the end user to fetch token from the preferred storage
 
-    Fetch the access_token and refresh_token for the given hostname.
-    Return OAuthToken(access_token, refresh_token)
-    """
-    pass
+        Fetch the access_token and refresh_token for the given hostname.
+        Return OAuthToken(access_token, refresh_token)
+        """
+        pass
 
-with sql.connect(server_hostname = os.getenv("DATABRICKS_SERVER_HOSTNAME"),
-                 http_path       = os.getenv("DATABRICKS_HTTP_PATH"),
-                 auth_type="databricks-oauth",
-                 experimental_oauth_persistence=DevOnlyFilePersistence("./sample.json")) as connection:
+
+with sql.connect(
+    server_hostname=os.getenv("DATABRICKS_SERVER_HOSTNAME"),
+    http_path=os.getenv("DATABRICKS_HTTP_PATH"),
+    auth_type="databricks-oauth",
+    experimental_oauth_persistence=DevOnlyFilePersistence("./sample.json"),
+) as connection:
 
     for x in range(1, 100):
         cursor = connection.cursor()
-        cursor.execute('SELECT 1+1')
+        cursor.execute("SELECT 1+1")
         result = cursor.fetchall()
         for row in result:
             print(row)

examples/query_cancel.py

@@ -5,47 +5,52 @@
 The current operation of a cursor may be cancelled by calling its `.cancel()` method as shown in the example below.
 """
 
-with sql.connect(server_hostname = os.getenv("DATABRICKS_SERVER_HOSTNAME"),
-                 http_path       = os.getenv("DATABRICKS_HTTP_PATH"),
-                 access_token    = os.getenv("DATABRICKS_TOKEN")) as connection:
+with sql.connect(
+    server_hostname=os.getenv("DATABRICKS_SERVER_HOSTNAME"),
+    http_path=os.getenv("DATABRICKS_HTTP_PATH"),
+    access_token=os.getenv("DATABRICKS_TOKEN"),
+) as connection:
 
-  with connection.cursor() as cursor:
-    def execute_really_long_query():
-        try:
-            cursor.execute("SELECT SUM(A.id - B.id) " +
-                            "FROM range(1000000000) A CROSS JOIN range(100000000) B " +
-                            "GROUP BY (A.id - B.id)")
-        except sql.exc.RequestError:
-          print("It looks like this query was cancelled.")
+    with connection.cursor() as cursor:
 
-    exec_thread = threading.Thread(target=execute_really_long_query)
+        def execute_really_long_query():
+            try:
+                cursor.execute(
+                    "SELECT SUM(A.id - B.id) "
+                    + "FROM range(1000000000) A CROSS JOIN range(100000000) B "
+                    + "GROUP BY (A.id - B.id)"
+                )
+            except sql.exc.RequestError:
+                print("It looks like this query was cancelled.")
 
-    print("\n Beginning to execute long query")
-    exec_thread.start()
+        exec_thread = threading.Thread(target=execute_really_long_query)
 
-    # Make sure the query has started before cancelling
-    print("\n Waiting 15 seconds before canceling", end="", flush=True)
+        print("\n Beginning to execute long query")
+        exec_thread.start()
 
-    seconds_waited = 0
-    while seconds_waited < 15:
-      seconds_waited += 1
-      print(".", end="", flush=True)
-      time.sleep(1)
+        # Make sure the query has started before cancelling
+        print("\n Waiting 15 seconds before canceling", end="", flush=True)
 
-    print("\n Cancelling the cursor's operation. This can take a few seconds.")
-    cursor.cancel()
+        seconds_waited = 0
+        while seconds_waited < 15:
+            seconds_waited += 1
+            print(".", end="", flush=True)
+            time.sleep(1)
 
-    print("\n Now checking the cursor status:")
-    exec_thread.join(5)
+        print("\n Cancelling the cursor's operation. This can take a few seconds.")
+        cursor.cancel()
 
-    assert not exec_thread.is_alive()
-    print("\n The previous command was successfully canceled")
+        print("\n Now checking the cursor status:")
+        exec_thread.join(5)
 
-    print("\n Now reusing the cursor to run a separate query.")
+        assert not exec_thread.is_alive()
+        print("\n The previous command was successfully canceled")
 
-    # We can still execute a new command on the cursor
-    cursor.execute("SELECT * FROM range(3)")
+        print("\n Now reusing the cursor to run a separate query.")
 
-    print("\n Execution was successful. Results appear below:")
+        # We can still execute a new command on the cursor
+        cursor.execute("SELECT * FROM range(3)")
 
-    print(cursor.fetchall())
+        print("\n Execution was successful. Results appear below:")
+
+        print(cursor.fetchall())

examples/query_execute.py

@@ -1,13 +1,15 @@
 from databricks import sql
 import os
 
-with sql.connect(server_hostname = os.getenv("DATABRICKS_SERVER_HOSTNAME"),
-                 http_path       = os.getenv("DATABRICKS_HTTP_PATH"),
-                 access_token    = os.getenv("DATABRICKS_TOKEN")) as connection:
+with sql.connect(
+    server_hostname=os.getenv("DATABRICKS_SERVER_HOSTNAME"),
+    http_path=os.getenv("DATABRICKS_HTTP_PATH"),
+    access_token=os.getenv("DATABRICKS_TOKEN"),
+) as connection:
 
-  with connection.cursor() as cursor:
-    cursor.execute("SELECT * FROM default.diamonds LIMIT 2")
-    result = cursor.fetchall()
+    with connection.cursor() as cursor:
+        cursor.execute("SELECT * FROM default.diamonds LIMIT 2")
+        result = cursor.fetchall()
 
-    for row in result:
-      print(row)
+        for row in result:
+            print(row)

examples/set_user_agent.py

@@ -1,14 +1,16 @@
 from databricks import sql
 import os
 
-with sql.connect(server_hostname = os.getenv("DATABRICKS_SERVER_HOSTNAME"),
-                 http_path       = os.getenv("DATABRICKS_HTTP_PATH"),
-                 access_token    = os.getenv("DATABRICKS_TOKEN"),
-                 _user_agent_entry="ExamplePartnerTag") as connection:
+with sql.connect(
+    server_hostname=os.getenv("DATABRICKS_SERVER_HOSTNAME"),
+    http_path=os.getenv("DATABRICKS_HTTP_PATH"),
+    access_token=os.getenv("DATABRICKS_TOKEN"),
+    _user_agent_entry="ExamplePartnerTag",
+) as connection:
 
-  with connection.cursor() as cursor:
-    cursor.execute("SELECT * FROM default.diamonds LIMIT 2")
-    result = cursor.fetchall()
+    with connection.cursor() as cursor:
+        cursor.execute("SELECT * FROM default.diamonds LIMIT 2")
+        result = cursor.fetchall()
 
-    for row in result:
-      print(row)
+        for row in result:
+            print(row)

examples/v3_retries_query_execute.py

@@ -28,16 +28,18 @@
 #
 # For complete information about configuring retries, see the docstring for databricks.sql.thrift_backend.ThriftBackend
 
-with sql.connect(server_hostname = os.getenv("DATABRICKS_SERVER_HOSTNAME"),
-                 http_path       = os.getenv("DATABRICKS_HTTP_PATH"),
-                 access_token    = os.getenv("DATABRICKS_TOKEN"),
-                 _enable_v3_retries = True,
-                 _retry_dangerous_codes=[502,400],
-                 _retry_max_redirects=2) as connection:
+with sql.connect(
+    server_hostname=os.getenv("DATABRICKS_SERVER_HOSTNAME"),
+    http_path=os.getenv("DATABRICKS_HTTP_PATH"),
+    access_token=os.getenv("DATABRICKS_TOKEN"),
+    _enable_v3_retries=True,
+    _retry_dangerous_codes=[502, 400],
+    _retry_max_redirects=2,
+) as connection:
 
-  with connection.cursor() as cursor:
-    cursor.execute("SELECT * FROM default.diamonds LIMIT 2")
-    result = cursor.fetchall()
+    with connection.cursor() as cursor:
+        cursor.execute("SELECT * FROM default.diamonds LIMIT 2")
+        result = cursor.fetchall()
 
-    for row in result:
-      print(row)
+        for row in result:
+            print(row)

src/databricks/sql/client.py

@@ -1,6 +1,7 @@
 from typing import Dict, Tuple, List, Optional, Any, Union, Sequence
 
 import pandas
+
 try:
     import pyarrow
 except ImportError:
@@ -26,7 +27,7 @@
     inject_parameters,
     transform_paramstyle,
     ColumnTable,
-    ColumnQueue
+    ColumnQueue,
 )
 from databricks.sql.parameters.native import (
     DbsqlParameterBase,
@@ -1155,7 +1156,7 @@ def _convert_columnar_table(self, table):
         for row_index in range(table.num_rows):
             curr_row = []
             for col_index in range(table.num_columns):
-                curr_row.append(table.get_item(col_index,  row_index))
+                curr_row.append(table.get_item(col_index, row_index))
             result.append(ResultRow(*curr_row))
 
         return result
@@ -1238,7 +1239,10 @@ def merge_columnar(self, result1, result2):
         if result1.column_names != result2.column_names:
             raise ValueError("The columns in the results don't match")
 
-        merged_result = [result1.column_table[i] + result2.column_table[i] for i in range(result1.num_columns)]
+        merged_result = [
+            result1.column_table[i] + result2.column_table[i]
+            for i in range(result1.num_columns)
+        ]
         return ColumnTable(merged_result, result1.column_names)
 
     def fetchmany_columnar(self, size: int):
@@ -1254,9 +1258,9 @@ def fetchmany_columnar(self, size: int):
         self._next_row_index += results.num_rows
 
         while (
-                n_remaining_rows > 0
-                and not self.has_been_closed_server_side
-                and self.has_more_rows
+            n_remaining_rows > 0
+            and not self.has_been_closed_server_side
+            and self.has_more_rows
         ):
             self._fill_results_buffer()
             partial_results = self.results.next_n_rows(n_remaining_rows)