Debug play_with_vna script by changing vna_name in lowercase and make it run

Also did code cleaning

Python_script/play_with_vna.py

 #!/usr/bin/python3
-from VNA_dummy import VnaDummy
+
 import VNA
 
-#VNA_name = 'Localhost'
-VNA_name = 'mskzna43'
+VNA_name = 'localhost'
+# VNA_name = 'mskzna43'
 
 # Connect to VNA dummy
-vna = VNA.create_VNA(VNA_name)
+vna = VNA.create_vna(VNA_name, [0.2, 0.1])
 print("connected")
 
 print("Created trace with parameter")
 new_trace = vna.create_new_trace("Trc2", "S22")
+print(new_trace)
 
 new_trace1 = vna.create_new_trace("Trc2", "S12")
 
@@ -20,8 +21,10 @@ print("get current trace")
 current = vna.get_tupple_of_current_traces()
 print("The current traces are" + str(current))
 
+string = vna.get_measurement_string('S12', 'SDAT')
+print(string)
 
-#get tupple of current traces
-#tuple = vna.get_tupple_of_current_traces()
-#print("The tuple for current Trace is" + str(tuple))
+# get tuple of current traces
+# tuple = vna.get_tuple_of_current_traces()
+# print("The tuple for current Trace is" + str(tuple))