Fix partner S7 Communication Setup and bsend/brecv PDU format

s7/__init__.py

@@ -15,6 +15,7 @@
 from .client import Client
 from .async_client import AsyncClient
 from .server import Server
+from .partner import Partner, PartnerStatus
 from ._protocol import Protocol
 
 from snap7.type import Area, Block, WordLen, SrvEvent, SrvArea
@@ -24,6 +25,8 @@
     "Client",
     "AsyncClient",
     "Server",
+    "Partner",
+    "PartnerStatus",
     "Protocol",
     "Area",
     "Block",

s7/partner.py

@@ -0,0 +1,21 @@
+"""Unified S7 partner for peer-to-peer communication.
+
+Wraps :class:`snap7.partner.Partner` so that the ``s7`` package is a
+drop-in replacement for ``snap7``, including partner functionality.
+
+Usage::
+
+    from s7 import Partner
+
+    partner = Partner(active=True)
+    partner.port = 102
+    partner.r_id = 0x00000001
+    partner.start_to("0.0.0.0", "192.168.1.10", 0x1300, 0x1301)
+    partner.set_send_data(b"Hello")
+    partner.b_send()
+    partner.stop()
+"""
+
+from snap7.partner import Partner, PartnerStatus
+
+__all__ = ["Partner", "PartnerStatus"]