Additions to Python instrument control

1. Include IDN? query with instrument write example.
2. Include example how to use the list_resources() function.

Instrument_Examples/General/Instructables/Get_Started_with_Instr_Control_Python/idn_query_and_command_write.py

@@ -0,0 +1,25 @@
+""" 
+    This script provides an example of how a programmer might issue
+    a query for an instrument's identification string as well as 
+    a simple command write. 
+"""
+import pyvisa
+rm = pyvisa.ResourceManager()
+
+# Start communicating with the target instrument with the name inst_1
+SMU2450 = rm.open_resource("USB0::0x05E6::0x2450::04509653::INSTR")
+
+# Try querying the command for the first time. The response
+#   should contain the instrument manufacturer name, model, 
+#   serial number, and firmware version in answer.
+answer = SMU2450.query("*IDN?")
+
+# Display the response.
+print(answer)
+
+# Issue a universal instrument reset.
+SMU2450.write("*RST")
+
+# Close communication with the device and the resource manager.
+SMU2450.close()
+rm.close()

Instrument_Examples/General/Instructables/Get_Started_with_Instr_Control_Python/list_resources.py

@@ -0,0 +1,14 @@
+"""
+    This script shows the programmer how they might use the 
+    Visa Resource Manager to list the instrument resource 
+    strings for all connected devices. 
+"""
+import pyvisa
+
+# Instantiate a resource manager object. 
+rm = pyvisa.ResourceManager()
+
+# Returns all resources (matching ?*::INSTR) retrieved by rm.
+print(rm.list_resources())
+
+rm.close()