modify python api

docs/examples/python/connect_websocket_examples.py

@@ -7,7 +7,7 @@ def create_connection():
         conn = taosws.connect(
             user="root",
             password="taosdata",
-            host="localhost",
+            host="192.168.1.98",
             port=6041,
         )
     except Exception as err:
@@ -21,12 +21,13 @@ def create_db_table(conn):
         conn.execute("CREATE DATABASE IF NOT EXISTS power")
         conn.execute("USE power")
         conn.execute("CREATE STABLE IF NOT EXISTS meters (ts TIMESTAMP, current FLOAT, voltage INT, phase FLOAT) TAGS (groupId INT, location BINARY(24))")
-        conn.execute("CREATE TABLE `d0` USING `meters` TAGS(0, 'Los Angles')")
+        conn.execute("CREATE TABLE  IF NOT EXISTS `d0` USING `meters` (groupId, location) TAGS(0, 'Los Angles')")
     except Exception as err:
         print(f'Exception {err}')
 # ANCHOR_END: create_db
 
 def insert(conn):
+# ANCHOR: insert
     sql = """
     INSERT INTO 
     power.d1001 USING power.meters TAGS('California.SanFrancisco', 2)
@@ -39,18 +40,26 @@ def insert(conn):
         inserted = conn.execute(sql)
         assert inserted == 8
     except Exception as err:
-        print(f'Exception {err}')   
+        print(f'Exception111 {err}')
+# ANCHOR_END: insert
 
 def query(conn):
-    result = conn.query("select * from stb")
+# ANCHOR: query
+    try:
+        result = conn.query("select * from meters")
         num_of_fields = result.field_count
         print(num_of_fields)
 
         for row in result:
             print(row)
+    except Exception as err:
+        print(f'Exception {err}')
+# ANCHOR_END: query
 
-# output:
-# 3
-# ('2023-02-28 15:56:13.329 +08:00', 1, 1)
-# ('2023-02-28 15:56:13.333 +08:00', 2, 1)
-# ('2023-02-28 15:56:13.337 +08:00', 3, 1)
+if __name__ == "__main__":
+    conn = create_connection()
+    create_db_table(conn)
+    insert(conn)
+    query(conn)
+    if conn:
+        conn.close()