Refactor partner module to match client/server pattern

- Create snap7/partner/__init__.py as base class with factory pattern
- Move existing ctypes partner to snap7/clib/partner.py (ClibPartner)
- Create snap7/native/partner.py pure Python implementation
- Create snap7/native/wire_partner.py for low-level wire protocol
- Update snap7/__init__.py to export ClibPartner and PurePartner
- Add mainloop wrapper to snap7/server/__init__.py to avoid circular imports

The Partner class now works like Client and Server:
- Partner() returns ClibPartner (ctypes, default)
- Partner(pure_python=True) returns PurePartner

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: gijzelaerr

snap7/__init__.py

@@ -5,95 +5,47 @@
 from importlib.metadata import version, PackageNotFoundError
 
 from .client import Client
+from snap7.clib.client import ClibClient
 from .server import Server
+from snap7.clib.server import ClibServer
 from .logo import Logo
 from .partner import Partner
+from snap7.clib.partner import ClibPartner
 from .util.db import Row, DB
 from .type import Area, Block, WordLen, SrvEvent, SrvArea
 
-# Pure Python client and server implementation
+# Pure Python implementations
 try:
-    from .native_client import Client as PureClient
-    from .native_server import Server as PureServer
+    from .native.wire_client import WireClient as PureClient
+    from snap7.native.server import Server as PureServer
+    from snap7.native.partner import Partner as PurePartner
     _PURE_PYTHON_AVAILABLE = True
 except ImportError:
     _PURE_PYTHON_AVAILABLE = False
     PureClient = None  # type: ignore
     PureServer = None  # type: ignore
-
-__all__ = ["Client", "Server", "Logo", "Partner", "Row", "DB", "Area", "Block", "WordLen", "SrvEvent", "SrvArea"]
+    PurePartner = None  # type: ignore
+
+__all__ = [
+    "Client",
+    "ClibClient",
+    "Server",
+    "ClibServer",
+    "Logo",
+    "Partner",
+    "ClibPartner",
+    "Row",
+    "DB",
+    "Area",
+    "Block",
+    "WordLen",
+    "SrvEvent",
+    "SrvArea",
+]
 
 # Add pure Python implementations to exports if available
 if _PURE_PYTHON_AVAILABLE:
-    __all__.extend(["PureClient", "PureServer"])
-
-
-def get_client(pure_python: bool = False):
-    """
-    Get a client instance using the specified backend.
-    
-    Args:
-        pure_python: If True, use pure Python implementation.
-                    If False (default), use ctypes wrapper around Snap7 C library.
-                    
-    Returns:
-        Client instance using the requested backend.
-        
-    Raises:
-        ImportError: If pure Python backend is requested but not available.
-        
-    Examples:
-        >>> # Use default ctypes backend
-        >>> client = snap7.get_client()
-        
-        >>> # Use pure Python backend  
-        >>> client = snap7.get_client(pure_python=True)
-    """
-    if pure_python:
-        if not _PURE_PYTHON_AVAILABLE:
-            raise ImportError(
-                "Pure Python client is not available. "
-                "This may be due to missing dependencies in the native module."
-            )
-        return PureClient()
-    else:
-        return Client()
-
-
-def get_server(pure_python: bool = False):
-    """
-    Get a server instance using the specified backend.
-    
-    Args:
-        pure_python: If True, use pure Python implementation.
-                    If False (default), use ctypes wrapper around Snap7 C library.
-                    
-    Returns:
-        Server instance using the requested backend.
-        
-    Raises:
-        ImportError: If pure Python backend is requested but not available.
-        
-    Examples:
-        >>> # Use default ctypes backend
-        >>> server = snap7.get_server()
-        
-        >>> # Use pure Python backend  
-        >>> server = snap7.get_server(pure_python=True)
-    """
-    if pure_python:
-        if not _PURE_PYTHON_AVAILABLE:
-            raise ImportError(
-                "Pure Python server is not available. "
-                "This may be due to missing dependencies in the native module."
-            )
-        return PureServer()
-    else:
-        return Server()
-
-
-# Add to exports
-__all__.extend(["get_client", "get_server"])
+    __all__.extend(["PureClient", "PureServer", "PurePartner"])
 
 try:
     __version__ = version("python-snap7")