make the code slightly less terrible

Python/tx_loop.py

@@ -2,6 +2,7 @@ import GPUtil
 import time
 from pySerialTransfer import pySerialTransfer as txfer
 from subprocess import getoutput
+from glob import glob
 
 try:
     # ---
@@ -13,13 +14,12 @@ try:
 
     port = 'ttyACM'
     while True:
-        ports = getoutput(f'ls /dev | grep {port}').split('\n')
-        if ports != ['']:
-            ports.sort()
-            port = ports[len(ports) - 1]
+        try:
+            port = glob(f'ls /dev/{port}*')[-]
             break
-        print('Waiting for Arduino...')
-        time.sleep(3)
+        except IndexError: 
+            print('Waiting for Arduino...')
+            time.sleep(3)
 
     link = txfer.SerialTransfer(port, 115200, timeout=.1)