venv added, updated

myenv/lib/python3.12/site-packages/pymodbus/framer/base.py

@@ -0,0 +1,43 @@
+"""Framer implementations.
+
+The implementation is responsible for encoding/decoding requests/responses.
+
+According to the selected type of modbus frame a prefix/suffix is added/removed
+"""
+from __future__ import annotations
+
+from abc import abstractmethod
+
+
+class FramerBase:
+    """Intern base."""
+
+    EMPTY = b''
+
+    def __init__(self) -> None:
+        """Initialize a ADU instance."""
+
+    def set_dev_ids(self, _dev_ids: list[int]):
+        """Set/update allowed device ids."""
+
+    def set_fc_calc(self, _fc: int, _msg_size: int, _count_pos: int):
+        """Set/Update function code information."""
+
+    @abstractmethod
+    def decode(self, data: bytes) -> tuple[int, int, int, bytes]:
+        """Decode ADU.
+
+        returns:
+            used_len (int) or 0 to read more
+            transaction_id (int) or 0
+            device_id (int) or 0
+            modbus request/response (bytes)
+        """
+
+    @abstractmethod
+    def encode(self, pdu: bytes, dev_id: int, tid: int) -> bytes:
+        """Encode ADU.
+
+        returns:
+            modbus ADU (bytes)
+        """