Cleanup code

app.py

@@ -21,6 +21,7 @@
 
 def main():
     server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+    server.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
     server.bind((BIND_IP, BIND_PORT))
     server.listen(5)
 
@@ -225,11 +226,9 @@ def calculate_crc(request: bytes) -> str:
 
 def calculate_message_length(request: bytes) -> str:
     message = get_message_contents_with_id(request)
-    lenght=pass_hexadecimal(len(message))
-    return f'{lenght.zfill(4)}'
+    hex_length = hex(len(message)).split('x')[1]
 
-def pass_hexadecimal(decimal: str):
-    return hex(decimal).split('x')[1]
+    return hex_length.zfill(4)
 
 
 def generate_timestamp() -> str:

test.py

@@ -6,14 +6,13 @@
 
 load_dotenv(find_dotenv())
 
-BIND_IP = os.getenv('BIND_IP')
 BIND_PORT = int(os.getenv('BIND_PORT'))
 
 # create an ipv4 (AF_INET) socket object using the tcp protocol (SOCK_STREAM)
 client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
 
 # connect the client
-client.connect((BIND_IP, BIND_PORT))
+client.connect(('127.0.0.1', BIND_PORT))
 
 ex_data = [
     b'\n9EC40027"ADM-CID"0001L0#1002[#1002|1602 00 001]\r',