add python example

docs/examples/python/create_db_native.py

@@ -15,8 +15,7 @@ try:
     assert rowsAffected == 0
 
     # change database. same as execute "USE db"
-    rowsAffected = conn.select_db(db)
-    assert rowsAffected == 0
+    conn.select_db(db)
     
     # create super table
     rowsAffected = conn.execute(

docs/examples/python/schemaless_ws.py

@@ -1,5 +1,26 @@
 import taosws
 
+db = "power"
+def prepare():
+    conn = None
+    try:
+        conn = taosws.connect(user="root",
+                            password="taosdata",
+                            host="localhost",
+                            port=6041)
+
+        # create database
+        rowsAffected = conn.execute(f"CREATE DATABASE IF NOT EXISTS {db}")
+        assert rowsAffected == 0
+
+    except Exception as err:
+        print(f"Failed to create db and table, err:{err}")
+    finally:
+        if conn:
+            conn.close()
+
+def schemaless_insert():
+
     conn = None
 
     lineDemo = [
@@ -16,32 +37,36 @@ try:
         conn = taosws.connect(user="root",
                               password="taosdata",
                               host="localhost",
-                          port=6041)
-
-    conn.execute("CREATE DATABASE IF NOT EXISTS power")
-    conn = conn.execute("USE power")
+                              port=6041,
+                              database=db)
 
         conn.schemaless_insert(
             lines=lineDemo,
             protocol=taosws.PySchemalessProtocol.Line,
-        precision=taosws.PySchemalessPrecision.Millisecond
+            precision=taosws.PySchemalessPrecision.Millisecond,
+            ttl=1,
+            req_id=1,
         )
 
         conn.schemaless_insert(
             lines=telnetDemo,
             protocol=taosws.PySchemalessProtocol.Telnet,
-        precision=taosws.PySchemalessPrecision.Microsecond
+            precision=taosws.PySchemalessPrecision.Microsecond,
+            ttl=1,
+            req_id=2,
         )
 
         conn.schemaless_insert(
             lines=jsonDemo,
             protocol=taosws.PySchemalessProtocol.Json,
-        precision=taosws.PySchemalessPrecision.Millisecond
+            precision=taosws.PySchemalessPrecision.Millisecond,
+            ttl=1,
+            req_id=3,
         )
+
     except Exception as err:
         print(f"Failed to insert data with schemaless, err:{err}")
 
     finally:
         if conn:
             conn.close()
-