Some minor changes

transmat.py

@@ -10,7 +10,7 @@ from progress.bar import Bar
 
 
 VERSION_NUMBER="0.1.1"
-
+SCRIPT_BASENAME = os.path.basename(sys.argv[0])
 
 async def read_chunks(filename, chunk_size = 1024):
     with open(filename, "rb") as f:
@@ -107,7 +107,7 @@ async def main():
     parser.add_argument('--password', type=str, help="Specify the shared password (for --receive)")
     args = parser.parse_args()    
     passwd_part = server_part = ""
-    send_part = f'{sys.argv[0]} --receive '
+    send_part = f'{SCRIPT_BASENAME} --receive'
     if args.receive:
         role = 'receive'
         password = args.password
@@ -128,7 +128,7 @@ async def main():
         WS_RELAY_SERVER = args.server
         server_part = f'--server {WS_RELAY_SERVER}'
     if args.version:
-        print(f"{sys.argv[0]} ver {VERSION_NUMBER}")
+        print(f"{SCRIPT_BASENAME} ver {VERSION_NUMBER}")
         sys.exit(0)
 
     k = derive_key_from_password(password)