bpo-34580: Update sqlite3 examples to call close() explicitly (GH-9079)

The sqlit3.Connection object doesn't call its close() method when it's used
as a context manager.

Author: tirkarthi

Doc/includes/sqlite3/adapter_datetime.py

@@ -13,3 +13,5 @@ def adapt_datetime(ts):
 now = datetime.datetime.now()
 cur.execute("select ?", (now,))
 print(cur.fetchone()[0])
+
+con.close()

Doc/includes/sqlite3/adapter_point_1.py

@@ -14,3 +14,5 @@ def __conform__(self, protocol):
 p = Point(4.0, -3.2)
 cur.execute("select ?", (p,))
 print(cur.fetchone()[0])
+
+con.close()

Doc/includes/sqlite3/adapter_point_2.py

@@ -15,3 +15,5 @@ def adapt_point(point):
 p = Point(4.0, -3.2)
 cur.execute("select ?", (p,))
 print(cur.fetchone()[0])
+
+con.close()

Doc/includes/sqlite3/connect_db_1.py

@@ -13,3 +13,5 @@ def cursor(self, *args, **kwargs):
 cur1 = con.cursor()
 cur2 = con.cursor()
 print(con.numcursors)
+
+con.close()

Doc/includes/sqlite3/connect_db_2.py

@@ -14,3 +14,7 @@
         con.execute("insert into person(firstname) values (?)", ("Joe",))
 except sqlite3.IntegrityError:
     print("couldn't add Joe twice")
+
+# Connection object used as context manager only commits or rollbacks transactions,
+# so the connection object should be closed manually
+con.close()

Doc/includes/sqlite3/countcursors.py

@@ -15,3 +15,5 @@
 cur.execute(SELECT)
 for row in cur:
     print('%s is %d years old.' % (row[0], row[1]))
+
+con.close()

Doc/includes/sqlite3/ctx_manager.py

@@ -11,3 +11,5 @@
 
 # Retrieve all rows as a sequence and print that sequence:
 print(cur.fetchall())
+
+con.close()

Doc/includes/sqlite3/execsql_fetchonerow.py

@@ -14,3 +14,5 @@
 cur.execute("select * from people where name_last=:who and age=:age", {"who": who, "age": age})
 
 print(cur.fetchone())
+
+con.close()