Updated the code

Author: ashwanitr

samples/tutorials/python/jupyter/sample_python_jupyter.py

@@ -5,8 +5,8 @@
 password = 'mypassword'
 
 #Connection String
-cnxn = pyodbc.connect('DRIVER={SQL Server Native Client 11.0};SERVER='+server+';DATABASE='+database+';UID='+username+';PWD='+ password)
-cursor = cnxn.cursor()
+connection = pyodbc.connect('DRIVER={SQL Server Native Client 11.0};SERVER='+server+';DATABASE='+database+';UID='+username+';PWD='+ password)
+cursor = connection.cursor()
 
 #Sample select query
 cursor.execute("SELECT @@version;")