no file update

app.py

@@ -7,7 +7,7 @@ import signal
 import sys
 from asyncio import AbstractEventLoop
 from concurrent.futures import ThreadPoolExecutor
-from typing import Any
+from typing import Any, Optional
 
 from absl import app, flags
 from marshmallow import EXCLUDE
@@ -44,7 +44,11 @@ class CSVLogger(PacketLogger):
 
     BREAK_LINE = "\r\n"
 
-    def __init__(self, file_path: str):
+    def __init__(self, file_path: Optional[str] = None):
+        self.file_path = file_path
+        self.file = None
+
+        if file_path is not None:
             self.file_path = file_path
             is_file_exists = os.path.exists(self.file_path)
             self.file = open(self.file_path, "a+")
@@ -65,6 +69,9 @@ class CSVLogger(PacketLogger):
     # noinspection PyBroadException
     def write(self, data: str) -> None:
         """ Try write """
+        if self.file is None:
+            return
+
         while True:
             try:
                 self.file.write(data)
@@ -88,6 +95,7 @@ class CSVLogger(PacketLogger):
 
     def save(self) -> None:
         """ Save data """
+        if self.file is not None:
             self.file.flush()
             self.file.close()