message callback handles first element correctly (refs #7598)

alexanderd · alexanderd · commit d56136115b30 · 2020-03-02T15:20:51.000Z
git-svn-id: http://isvn/svn/rep_IEP-I000261_LINUX-KERNEL/01_Entwicklung/trunk/10_Entwicklung/28_SW_Komponente_XCOM/30_IMPL/XCOM_Client_Python/dependencies/ixcom-public@12244 fa3a88b2-825e-5648-bb98-bb0d4e3c2968
diff --git a/ixcom/grep.py b/ixcom/grep.py
@@ -50,12 +50,12 @@ def read_file(filename='iXCOMstream.bin'):
     message_searcher = MessageSearcher(disable_crc = True)
 
     def message_callback(in_bytes):
+        if not in_bytes:
+            return
         message_id = int(in_bytes[1])
-        try:
-            message_bytes_dict[message_id].write(in_bytes)
-        except:
-            message_bytes_dict[message_id] = io.BytesIO(in_bytes)
-            message_bytes_dict[message_id].write(in_bytes) # initial bytes werden von write ueberschrieben
+        if message_id not in message_bytes_dict:
+            message_bytes_dict[message_id] =  io.BytesIO(b'')
+        message_bytes_dict[message_id].write(in_bytes)
 
     config = {}
     def parameter_callback(msg, from_device):
