Added read serial funvtion to python code

usb_send.py

 import serial
+import serial.tools.list_ports
 import numpy as np
 import time
 import struct
@@ -19,6 +20,32 @@ x = 270
 
 my_serial = None 
 
+
+def get_hair_puller_connection():
+    ports = serial.tools.list_ports.comports(include_links=False)
+    for port in ports :
+        print('Checking port '+ port.device)
+        try:
+            ser = serial.Serial(port.device)
+            if ser.isOpen():
+                print("closing",port.device)
+                ser.close()
+            ser = serial.Serial(port.device, BAUDRATE, timeout=0.5)
+            ser.flushInput()
+            ser.flushOutput()               
+            testmessage = ser.readline().decode('utf-8')
+            print("Response:", testmessage[-1])
+        except:
+            print("Problem with",port.device)
+                
+
+def read_my_serial(serial):
+    getData=str(serial.readline())
+    data=getData[0:][:-2]
+    # get read of leading byres character and ending r character
+    # create row string
+    row_string = data[2:-3]+"\n"
+
 try:
     my_serial = serial.Serial(COM, baudrate= BAUDRATE, timeout = 2)
     print("Device found")