add python example

docs/examples/python/connect_example.py

@@ -21,4 +21,4 @@ def create_connection():
 
 
 if __name__ == "__main__":
-    create_connection()
+    create_connection()

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

@@ -1,47 +1,72 @@
 import taosws
 
-conn = None
+db = "power"
+def prepare():
+    conn = None
+    try:
+        conn = taosws.connect(user="root",
+                            password="taosdata",
+                            host="localhost",
+                            port=6041)
 
-lineDemo = [
-    "meters,groupid=2,location=California.SanFrancisco current=10.3000002f64,voltage=219i32,phase=0.31f64 1626006833639"
-]
+        # create database
+        rowsAffected = conn.execute(f"CREATE DATABASE IF NOT EXISTS {db}")
+        assert rowsAffected == 0
 
-telnetDemo = ["metric_telnet 1707095283260 4 host=host0 interface=eth0"]
+    except Exception as err:
+        print(f"Failed to create db and table, err:{err}")
+    finally:
+        if conn:
+            conn.close()
 
-jsonDemo = [
-    '{"metric": "metric_json","timestamp": 1626846400,"value": 10.3, "tags": {"groupid": 2, "location": "California.SanFrancisco", "id": "d1001"}}'
-]
+def schemaless_insert():
 
-try:
-    conn = taosws.connect(user="root",
-                          password="taosdata",
-                          host="localhost",
-                          port=6041)
+    conn = None
 
-    conn.execute("CREATE DATABASE IF NOT EXISTS power")
-    conn = conn.execute("USE power")
+    lineDemo = [
+        "meters,groupid=2,location=California.SanFrancisco current=10.3000002f64,voltage=219i32,phase=0.31f64 1626006833639"
+    ]
 
-    conn.schemaless_insert(
-        lines=lineDemo,
-        protocol=taosws.PySchemalessProtocol.Line,
-        precision=taosws.PySchemalessPrecision.Millisecond
-    )
+    telnetDemo = ["metric_telnet 1707095283260 4 host=host0 interface=eth0"]
 
-    conn.schemaless_insert(
-        lines=telnetDemo,
-        protocol=taosws.PySchemalessProtocol.Telnet,
-        precision=taosws.PySchemalessPrecision.Microsecond
-    )
+    jsonDemo = [
+        '{"metric": "metric_json","timestamp": 1626846400,"value": 10.3, "tags": {"groupid": 2, "location": "California.SanFrancisco", "id": "d1001"}}'
+    ]
 
-    conn.schemaless_insert(
-        lines=jsonDemo,
-        protocol=taosws.PySchemalessProtocol.Json,
-        precision=taosws.PySchemalessPrecision.Millisecond
-    )
-except Exception as err:
-    print(f"Failed to insert data with schemaless, err:{err}")
-            
-finally:
-    if conn:
-        conn.close()
+    try:
+        conn = taosws.connect(user="root",
+                              password="taosdata",
+                              host="localhost",
+                              port=6041,
+                              database=db)
 
+        conn.schemaless_insert(
+            lines=lineDemo,
+            protocol=taosws.PySchemalessProtocol.Line,
+            precision=taosws.PySchemalessPrecision.Millisecond,
+            ttl=1,
+            req_id=1,
+        )
+
+        conn.schemaless_insert(
+            lines=telnetDemo,
+            protocol=taosws.PySchemalessProtocol.Telnet,
+            precision=taosws.PySchemalessPrecision.Microsecond,
+            ttl=1,
+            req_id=2,
+        )
+
+        conn.schemaless_insert(
+            lines=jsonDemo,
+            protocol=taosws.PySchemalessProtocol.Json,
+            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()