added comments

read.py

@@ -2,22 +2,29 @@ import hid
 
 
 def get_readers():
+    # Return a list of all HID devices that have a manufacturer string of 'Mag-Tek'
     return [item for item in hid.enumerate() if item["manufacturer_string"]=="Mag-Tek"]
 
 def get_device_from_reader(reader):
+    # convert from a json obj to an HID obj
+
     return hid.Device(reader["vendor_id"], reader["product_id"])
 
 def get_device_from_readers(readers):
+    # Convert the get_readers list into an actual device
+
+    # if there are no readers
     if len(readers) == 0:
         print("No Mag-Tek reader detected - Quiting")
         return
 
+    # if there's multiple readers
     elif len(readers) > 1:
         devices = []
         for i in range(len(readers)):
             try:
                 a = readers[i]
-                dev = hid.Device(a["vendor_id"],a["product_id"])
+                dev = get_device_from_reader(a)
                 devices.append(dev)
                 print(f"{i})\t\'{dev.manufacturer} {dev.product}\' - {'nonblocking' if dev.nonblocking else 'blocking'}")
                 
@@ -26,9 +33,12 @@ def get_device_from_readers(readers):
                 devices.append(None)
 
         return devices[int(input( "Enter desired reader number" ))]
+
+    # if there's 1 reader
     return get_device_from_reader(readers[0])
 
 def read(device):
+    # read input from a device
     print("Waiting for swipe...")
     return device.read(256)