/// <summary> /// ModuleObject __getattribute__ implementation. Module attributes /// are always either classes or sub-modules representing subordinate /// namespaces. CLR modules implement a lazy pattern - the sub-modules /// and classes are created when accessed and cached for future use. /// </summary> public static IntPtr tp_getattro(IntPtr ob, IntPtr key) { var self = (ModuleObject)GetManagedObject(ob); if (!Runtime.PyString_Check(key)) { Exceptions.SetError(Exceptions.TypeError, "string expected"); return(IntPtr.Zero); } IntPtr op = Runtime.PyDict_GetItem(self.dict, key); if (op != IntPtr.Zero) { Runtime.XIncref(op); return(op); } string name = Runtime.GetManagedString(key); if (name == "__dict__") { Runtime.XIncref(self.dict); return(self.dict); } ManagedType attr = null; try { attr = self.GetAttribute(name, true); } catch (Exception e) { Exceptions.SetError(e); return(IntPtr.Zero); } if (attr == null) { Exceptions.SetError(Exceptions.AttributeError, name); return(IntPtr.Zero); } Runtime.XIncref(attr.pyHandle); return(attr.pyHandle); }
/// <summary> /// The actual import hook that ties Python to the managed world. /// </summary> public static IntPtr __import__(IntPtr self, IntPtr argsRaw, IntPtr kw) { var args = new BorrowedReference(argsRaw); // Replacement for the builtin __import__. The original import // hook is saved as this.py_import. This version handles CLR // import and defers to the normal builtin for everything else. var num_args = Runtime.PyTuple_Size(args); if (num_args < 1) { return(Exceptions.RaiseTypeError("__import__() takes at least 1 argument (0 given)")); } BorrowedReference py_mod_name = Runtime.PyTuple_GetItem(args, 0); if (py_mod_name.IsNull || !Runtime.IsStringType(py_mod_name)) { return(Exceptions.RaiseTypeError("string expected")); } // Check whether the import is of the form 'from x import y'. // This determines whether we return the head or tail module. BorrowedReference fromList = default; var fromlist = false; if (num_args >= 4) { fromList = Runtime.PyTuple_GetItem(args, 3); if (fromList != null && Runtime.PyObject_IsTrue(fromList) == 1) { fromlist = true; } } string mod_name = Runtime.GetManagedString(py_mod_name); // Check these BEFORE the built-in import runs; may as well // do the Incref()ed return here, since we've already found // the module. if (mod_name == "clr") { NewReference clr_module = GetCLRModule(fromList); if (!clr_module.IsNull()) { BorrowedReference sys_modules = Runtime.PyImport_GetModuleDict(); if (!sys_modules.IsNull) { Runtime.PyDict_SetItemString(sys_modules, "clr", clr_module); } } return(clr_module.DangerousMoveToPointerOrNull()); } string realname = mod_name; // 2010-08-15: Always seemed smart to let python try first... // This shaves off a few tenths of a second on test_module.py // and works around a quirk where 'sys' is found by the // LoadImplicit() deprecation logic. // Turns out that the AssemblyManager.ResolveHandler() checks to see if any // Assembly's FullName.ToLower().StartsWith(name.ToLower()), which makes very // little sense to me. IntPtr res = Runtime.PyObject_Call(py_import, args.DangerousGetAddress(), kw); if (res != IntPtr.Zero) { // There was no error. if (fromlist && IsLoadAll(fromList)) { var mod = ManagedType.GetManagedObject(res) as ModuleObject; mod?.LoadNames(); } return(res); } // There was an error if (!Exceptions.ExceptionMatches(Exceptions.ImportError)) { // and it was NOT an ImportError; bail out here. return(IntPtr.Zero); } if (mod_name == string.Empty) { // Most likely a missing relative import. // For example site-packages\bs4\builder\__init__.py uses it to check if a package exists: // from . import _html5lib // We don't support them anyway return(IntPtr.Zero); } // Save the exception var originalException = new PythonException(); // Otherwise, just clear the it. Exceptions.Clear(); string[] names = realname.Split('.'); // See if sys.modules for this interpreter already has the // requested module. If so, just return the existing module. BorrowedReference modules = Runtime.PyImport_GetModuleDict(); BorrowedReference module = Runtime.PyDict_GetItem(modules, py_mod_name); if (module != null) { if (fromlist) { if (IsLoadAll(fromList)) { var mod = ManagedType.GetManagedObject(module) as ModuleObject; mod?.LoadNames(); } return(new NewReference(module).DangerousMoveToPointer()); } module = Runtime.PyDict_GetItemString(modules, names[0]); return(new NewReference(module, canBeNull: true).DangerousMoveToPointer()); } Exceptions.Clear(); // Traverse the qualified module name to get the named module // and place references in sys.modules as we go. Note that if // we are running in interactive mode we pre-load the names in // each module, which is often useful for introspection. If we // are not interactive, we stick to just-in-time creation of // objects at lookup time, which is much more efficient. // NEW: The clr got a new module variable preload. You can // enable preloading in a non-interactive python processing by // setting clr.preload = True ModuleObject head = mod_name == realname ? null : root; ModuleObject tail = root; root.InitializePreload(); foreach (string name in names) { ManagedType mt = tail.GetAttribute(name, true); if (!(mt is ModuleObject)) { originalException.Restore(); return(IntPtr.Zero); } if (head == null) { head = (ModuleObject)mt; } tail = (ModuleObject)mt; if (CLRModule.preload) { tail.LoadNames(); } // Add the module to sys.modules Runtime.PyDict_SetItemString(modules, tail.moduleName, tail.ObjectReference); } { var mod = fromlist ? tail : head; if (fromlist && IsLoadAll(fromList)) { mod.LoadNames(); } Runtime.XIncref(mod.pyHandle); return(mod.pyHandle); } }
//=================================================================== // The actual import hook that ties Python to the managed world. //=================================================================== public static IntPtr __import__(IntPtr self, IntPtr args, IntPtr kw) { // Replacement for the builtin __import__. The original import // hook is saved as this.py_import. This version handles CLR // import and defers to the normal builtin for everything else. int num_args = Runtime.PyTuple_Size(args); if (num_args < 1) { return(Exceptions.RaiseTypeError( "__import__() takes at least 1 argument (0 given)" )); } // borrowed reference IntPtr py_mod_name = Runtime.PyTuple_GetItem(args, 0); if ((py_mod_name == IntPtr.Zero) || (!Runtime.IsStringType(py_mod_name))) { return(Exceptions.RaiseTypeError("string expected")); } // Check whether the import is of the form 'from x import y'. // This determines whether we return the head or tail module. IntPtr fromList = IntPtr.Zero; bool fromlist = false; if (num_args >= 4) { fromList = Runtime.PyTuple_GetItem(args, 3); if ((fromList != IntPtr.Zero) && (Runtime.PyObject_IsTrue(fromList) == 1)) { fromlist = true; } } string mod_name = Runtime.GetManagedString(py_mod_name); // Check these BEFORE the built-in import runs; may as well // do the Incref()ed return here, since we've already found // the module. if (mod_name == "clr") { root.InitializePreload(); Runtime.Incref(root.pyHandle); return(root.pyHandle); } if (mod_name == "CLR") { Exceptions.deprecation("The CLR module is deprecated. " + "Please use 'clr'."); root.InitializePreload(); Runtime.Incref(root.pyHandle); return(root.pyHandle); } string realname = mod_name; if (mod_name.StartsWith("CLR.")) { realname = mod_name.Substring(4); string msg = String.Format("Importing from the CLR.* namespace " + "is deprecated. Please import '{0}' directly.", realname); Exceptions.deprecation(msg); } else { // 2010-08-15: Always seemed smart to let python try first... // This shaves off a few tenths of a second on test_module.py // and works around a quirk where 'sys' is found by the // LoadImplicit() deprecation logic. // Turns out that the AssemblyManager.ResolveHandler() checks to see if any // Assembly's FullName.ToLower().StartsWith(name.ToLower()), which makes very // little sense to me. IntPtr res = Runtime.PyObject_Call(py_import, args, kw); if (res != IntPtr.Zero) { // There was no error. return(res); } // There was an error if (!Exceptions.ExceptionMatches(Exceptions.ImportError)) { // and it was NOT an ImportError; bail out here. return(IntPtr.Zero); } // Otherwise, just clear the it. Exceptions.Clear(); } string[] names = realname.Split('.'); // Now we need to decide if the name refers to a CLR module, // and may have to do an implicit load (for b/w compatibility) // using the AssemblyManager. The assembly manager tries // really hard not to use Python objects or APIs, because // parts of it can run recursively and on strange threads. // // It does need an opportunity from time to time to check to // see if sys.path has changed, in a context that is safe. Here // we know we have the GIL, so we'll let it update if needed. AssemblyManager.UpdatePath(); if (!AssemblyManager.IsValidNamespace(realname)) { bool fromFile = false; if (AssemblyManager.LoadImplicit(realname, out fromFile)) { if (true == fromFile) { string deprWarning = String.Format("\nThe module was found, but not in a referenced namespace.\n" + "Implicit loading is deprecated. Please use clr.AddReference(\"{0}\").", realname); Exceptions.deprecation(deprWarning); } } else { // May be called when a module being imported imports a module. // In particular, I've seen decimal import copy import org.python.core return(Runtime.PyObject_Call(py_import, args, kw)); } } // See if sys.modules for this interpreter already has the // requested module. If so, just return the exising module. IntPtr modules = Runtime.PyImport_GetModuleDict(); IntPtr module = Runtime.PyDict_GetItem(modules, py_mod_name); if (module != IntPtr.Zero) { if (fromlist) { Runtime.Incref(module); return(module); } module = Runtime.PyDict_GetItemString(modules, names[0]); Runtime.Incref(module); return(module); } Exceptions.Clear(); // Traverse the qualified module name to get the named module // and place references in sys.modules as we go. Note that if // we are running in interactive mode we pre-load the names in // each module, which is often useful for introspection. If we // are not interactive, we stick to just-in-time creation of // objects at lookup time, which is much more efficient. // NEW: The clr got a new module variable preload. You can // enable preloading in a non-interactive python processing by // setting clr.preload = True ModuleObject head = (mod_name == realname) ? null : root; ModuleObject tail = root; root.InitializePreload(); for (int i = 0; i < names.Length; i++) { string name = names[i]; ManagedType mt = tail.GetAttribute(name, true); if (!(mt is ModuleObject)) { string error = String.Format("No module named {0}", name); Exceptions.SetError(Exceptions.ImportError, error); return(IntPtr.Zero); } if (head == null) { head = (ModuleObject)mt; } tail = (ModuleObject)mt; if (CLRModule.preload) { tail.LoadNames(); } Runtime.PyDict_SetItemString(modules, tail.moduleName, tail.pyHandle ); } ModuleObject mod = fromlist ? tail : head; if (fromlist && Runtime.PySequence_Size(fromList) == 1) { IntPtr fp = Runtime.PySequence_GetItem(fromList, 0); if ((!CLRModule.preload) && Runtime.GetManagedString(fp) == "*") { mod.LoadNames(); } Runtime.Decref(fp); } Runtime.Incref(mod.pyHandle); return(mod.pyHandle); }
internal static IntPtr CreateSubType(IntPtr py_name, IntPtr py_base_type, IntPtr py_dict) { // Utility to create a subtype of a managed type with the ability for the // a python subtype able to override the managed implementation string name = Runtime.GetManagedString(py_name); // the derived class can have class attributes __assembly__ and __module__ which // control the name of the assembly and module the new type is created in. object assembly = null; object namespaceStr = null; var disposeList = new List <PyObject>(); try { var assemblyKey = new PyObject(Converter.ToPython("__assembly__", typeof(string))); disposeList.Add(assemblyKey); if (0 != Runtime.PyMapping_HasKey(py_dict, assemblyKey.Handle)) { var pyAssembly = new PyObject(Runtime.PyDict_GetItem(py_dict, assemblyKey.Handle)); Runtime.XIncref(pyAssembly.Handle); disposeList.Add(pyAssembly); if (!Converter.ToManagedValue(pyAssembly.Handle, typeof(string), out assembly, false)) { throw new InvalidCastException("Couldn't convert __assembly__ value to string"); } } var namespaceKey = new PyObject(Converter.ToPythonImplicit("__namespace__")); disposeList.Add(namespaceKey); if (0 != Runtime.PyMapping_HasKey(py_dict, namespaceKey.Handle)) { var pyNamespace = new PyObject(Runtime.PyDict_GetItem(py_dict, namespaceKey.Handle)); Runtime.XIncref(pyNamespace.Handle); disposeList.Add(pyNamespace); if (!Converter.ToManagedValue(pyNamespace.Handle, typeof(string), out namespaceStr, false)) { throw new InvalidCastException("Couldn't convert __namespace__ value to string"); } } } finally { foreach (PyObject o in disposeList) { o.Dispose(); } } // create the new managed type subclassing the base managed type var baseClass = ManagedType.GetManagedObject(py_base_type) as ClassBase; if (null == baseClass) { return(Exceptions.RaiseTypeError("invalid base class, expected CLR class type")); } try { Type subType = ClassDerivedObject.CreateDerivedType(name, baseClass.type, py_dict, (string)namespaceStr, (string)assembly); // create the new ManagedType and python type ClassBase subClass = ClassManager.GetClass(subType); IntPtr py_type = GetTypeHandle(subClass, subType); // by default the class dict will have all the C# methods in it, but as this is a // derived class we want the python overrides in there instead if they exist. IntPtr cls_dict = Marshal.ReadIntPtr(py_type, TypeOffset.tp_dict); Runtime.PyDict_Update(cls_dict, py_dict); return(py_type); } catch (Exception e) { return(Exceptions.RaiseTypeError(e.Message)); } }
/// <summary> /// The actual import hook that ties Python to the managed world. /// </summary> public static IntPtr __import__(IntPtr self, IntPtr args, IntPtr kw) { // Replacement for the builtin __import__. The original import // hook is saved as this.py_import. This version handles CLR // import and defers to the normal builtin for everything else. var num_args = Runtime.PyTuple_Size(args); if (num_args < 1) { return(Exceptions.RaiseTypeError("__import__() takes at least 1 argument (0 given)")); } // borrowed reference IntPtr py_mod_name = Runtime.PyTuple_GetItem(args, 0); if (py_mod_name == IntPtr.Zero || !Runtime.IsStringType(py_mod_name)) { return(Exceptions.RaiseTypeError("string expected")); } // Check whether the import is of the form 'from x import y'. // This determines whether we return the head or tail module. IntPtr fromList = IntPtr.Zero; var fromlist = false; if (num_args >= 4) { fromList = Runtime.PyTuple_GetItem(args, 3); if (fromList != IntPtr.Zero && Runtime.PyObject_IsTrue(fromList) == 1) { fromlist = true; } } string mod_name = Runtime.GetManagedString(py_mod_name); // Check these BEFORE the built-in import runs; may as well // do the Incref()ed return here, since we've already found // the module. if (mod_name == "clr" || mod_name == "CLR") { if (mod_name == "CLR") { Exceptions.deprecation("The CLR module is deprecated. Please use 'clr'."); } IntPtr clr_module = GetCLRModule(fromList); if (clr_module != IntPtr.Zero) { IntPtr sys_modules = Runtime.PyImport_GetModuleDict(); if (sys_modules != IntPtr.Zero) { Runtime.PyDict_SetItemString(sys_modules, "clr", clr_module); } } return(clr_module); } string realname = mod_name; string clr_prefix = null; if (mod_name.StartsWith("CLR.")) { clr_prefix = "CLR."; // prepend when adding the module to sys.modules realname = mod_name.Substring(4); string msg = $"Importing from the CLR.* namespace is deprecated. Please import '{realname}' directly."; Exceptions.deprecation(msg); } else { // 2010-08-15: Always seemed smart to let python try first... // This shaves off a few tenths of a second on test_module.py // and works around a quirk where 'sys' is found by the // LoadImplicit() deprecation logic. // Turns out that the AssemblyManager.ResolveHandler() checks to see if any // Assembly's FullName.ToLower().StartsWith(name.ToLower()), which makes very // little sense to me. IntPtr res = Runtime.PyObject_Call(py_import, args, kw); if (res != IntPtr.Zero) { // There was no error. if (fromlist && IsLoadAll(fromList)) { var mod = ManagedType.GetManagedObject(res) as ModuleObject; mod?.LoadNames(); } return(res); } // There was an error if (!Exceptions.ExceptionMatches(Exceptions.ImportError)) { // and it was NOT an ImportError; bail out here. return(IntPtr.Zero); } if (mod_name == string.Empty) { // Most likely a missing relative import. // For example site-packages\bs4\builder\__init__.py uses it to check if a package exists: // from . import _html5lib // We don't support them anyway return(IntPtr.Zero); } // Otherwise, just clear the it. Exceptions.Clear(); } string[] names = realname.Split('.'); // Now we need to decide if the name refers to a CLR module, // and may have to do an implicit load (for b/w compatibility) // using the AssemblyManager. The assembly manager tries // really hard not to use Python objects or APIs, because // parts of it can run recursively and on strange threads. // // It does need an opportunity from time to time to check to // see if sys.path has changed, in a context that is safe. Here // we know we have the GIL, so we'll let it update if needed. AssemblyManager.UpdatePath(); if (!AssemblyManager.IsValidNamespace(realname)) { var loadExceptions = new List <Exception>(); if (!AssemblyManager.LoadImplicit(realname, assemblyLoadErrorHandler: loadExceptions.Add)) { // May be called when a module being imported imports a module. // In particular, I've seen decimal import copy import org.python.core IntPtr importResult = Runtime.PyObject_Call(py_import, args, kw); // TODO: use ModuleNotFoundError in Python 3.6+ if (importResult == IntPtr.Zero && loadExceptions.Count > 0 && Exceptions.ExceptionMatches(Exceptions.ImportError)) { loadExceptions.Add(new PythonException()); var importError = new PyObject(new BorrowedReference(Exceptions.ImportError)); importError.SetAttr("__cause__", new AggregateException(loadExceptions).ToPython()); Runtime.PyErr_SetObject(new BorrowedReference(Exceptions.ImportError), importError.Reference); } return(importResult); } } // See if sys.modules for this interpreter already has the // requested module. If so, just return the existing module. IntPtr modules = Runtime.PyImport_GetModuleDict(); IntPtr module = Runtime.PyDict_GetItem(modules, py_mod_name); if (module != IntPtr.Zero) { if (fromlist) { if (IsLoadAll(fromList)) { var mod = ManagedType.GetManagedObject(module) as ModuleObject; mod?.LoadNames(); } Runtime.XIncref(module); return(module); } if (clr_prefix != null) { return(GetCLRModule(fromList)); } module = Runtime.PyDict_GetItemString(modules, names[0]); Runtime.XIncref(module); return(module); } Exceptions.Clear(); // Traverse the qualified module name to get the named module // and place references in sys.modules as we go. Note that if // we are running in interactive mode we pre-load the names in // each module, which is often useful for introspection. If we // are not interactive, we stick to just-in-time creation of // objects at lookup time, which is much more efficient. // NEW: The clr got a new module variable preload. You can // enable preloading in a non-interactive python processing by // setting clr.preload = True ModuleObject head = mod_name == realname ? null : root; ModuleObject tail = root; root.InitializePreload(); foreach (string name in names) { ManagedType mt = tail.GetAttribute(name, true); if (!(mt is ModuleObject)) { Exceptions.SetError(Exceptions.ImportError, $"No module named {name}"); return(IntPtr.Zero); } if (head == null) { head = (ModuleObject)mt; } tail = (ModuleObject)mt; if (CLRModule.preload) { tail.LoadNames(); } // Add the module to sys.modules Runtime.PyDict_SetItemString(modules, tail.moduleName, tail.pyHandle); // If imported from CLR add CLR.<modulename> to sys.modules as well if (clr_prefix != null) { Runtime.PyDict_SetItemString(modules, clr_prefix + tail.moduleName, tail.pyHandle); } } { var mod = fromlist ? tail : head; if (fromlist && IsLoadAll(fromList)) { mod.LoadNames(); } Runtime.XIncref(mod.pyHandle); return(mod.pyHandle); } }
/// <summary> /// Metatype __new__ implementation. This is called to create a new /// class / type when a reflected class is subclassed. /// </summary> public static IntPtr tp_new(IntPtr tp, IntPtr args, IntPtr kw) { var len = Runtime.PyTuple_Size(args); if (len < 3) { return(Exceptions.RaiseTypeError("invalid argument list")); } IntPtr name = Runtime.PyTuple_GetItem(args, 0); IntPtr bases = Runtime.PyTuple_GetItem(args, 1); IntPtr dict = Runtime.PyTuple_GetItem(args, 2); // We do not support multiple inheritance, so the bases argument // should be a 1-item tuple containing the type we are subtyping. // That type must itself have a managed implementation. We check // that by making sure its metatype is the CLR metatype. if (Runtime.PyTuple_Size(bases) != 1) { return(Exceptions.RaiseTypeError("cannot use multiple inheritance with managed classes")); } IntPtr base_type = Runtime.PyTuple_GetItem(bases, 0); IntPtr mt = Runtime.PyObject_TYPE(base_type); if (!(mt == PyCLRMetaType || mt == Runtime.PyTypeType)) { return(Exceptions.RaiseTypeError("invalid metatype")); } // Ensure that the reflected type is appropriate for subclassing, // disallowing subclassing of delegates, enums and array types. var cb = GetManagedObject(base_type) as ClassBase; if (cb != null) { if (!cb.CanSubclass()) { return(Exceptions.RaiseTypeError("delegates, enums and array types cannot be subclassed")); } } IntPtr slots = Runtime.PyDict_GetItem(dict, PyIdentifier.__slots__); if (slots != IntPtr.Zero) { return(Exceptions.RaiseTypeError("subclasses of managed classes do not support __slots__")); } // If __assembly__ or __namespace__ are in the class dictionary then create // a managed sub type. // This creates a new managed type that can be used from .net to call back // into python. if (IntPtr.Zero != dict) { Runtime.XIncref(dict); using (var clsDict = new PyDict(dict)) { if (clsDict.HasKey("__assembly__") || clsDict.HasKey("__namespace__")) { return(TypeManager.CreateSubType(name, base_type, dict)); } } } // otherwise just create a basic type without reflecting back into the managed side. IntPtr func = Marshal.ReadIntPtr(Runtime.PyTypeType, TypeOffset.tp_new); IntPtr type = NativeCall.Call_3(func, tp, args, kw); if (type == IntPtr.Zero) { return(IntPtr.Zero); } int flags = TypeFlags.Default; flags |= TypeFlags.Managed; flags |= TypeFlags.HeapType; flags |= TypeFlags.BaseType; flags |= TypeFlags.Subclass; flags |= TypeFlags.HaveGC; Util.WriteCLong(type, TypeOffset.tp_flags, flags); TypeManager.CopySlot(base_type, type, TypeOffset.tp_dealloc); // Hmm - the standard subtype_traverse, clear look at ob_size to // do things, so to allow gc to work correctly we need to move // our hidden handle out of ob_size. Then, in theory we can // comment this out and still not crash. TypeManager.CopySlot(base_type, type, TypeOffset.tp_traverse); TypeManager.CopySlot(base_type, type, TypeOffset.tp_clear); // for now, move up hidden handle... IntPtr gc = Marshal.ReadIntPtr(base_type, TypeOffset.magic()); Marshal.WriteIntPtr(type, TypeOffset.magic(), gc); return(type); }
//=================================================================== // The actual import hook that ties Python to the managed world. //=================================================================== public static IntPtr __import__(IntPtr self, IntPtr args, IntPtr kw) { // Replacement for the builtin __import__. The original import // hook is saved as this.py_import. This version handles CLR // import and defers to the normal builtin for everything else. int num_args = Runtime.PyTuple_Size(args); if (num_args < 1) { return(Exceptions.RaiseTypeError( "__import__() takes at least 1 argument (0 given)" )); } // borrowed reference IntPtr py_mod_name = Runtime.PyTuple_GetItem(args, 0); if ((py_mod_name == IntPtr.Zero) || (!Runtime.IsStringType(py_mod_name))) { return(Exceptions.RaiseTypeError("string expected")); } // Check whether the import is of the form 'from x import y'. // This determines whether we return the head or tail module. IntPtr fromList = IntPtr.Zero; bool fromlist = false; if (num_args >= 4) { fromList = Runtime.PyTuple_GetItem(args, 3); if ((fromList != IntPtr.Zero) && (Runtime.PyObject_IsTrue(fromList) == 1)) { fromlist = true; } } string mod_name = Runtime.GetManagedString(py_mod_name); if (mod_name == "CLR") { Exceptions.deprecation("The CLR module is deprecated. " + "Please use 'clr'."); root.InitializePreload(); Runtime.Incref(root.pyHandle); return(root.pyHandle); } if (mod_name == "clr") { root.InitializePreload(); Runtime.Incref(root.pyHandle); return(root.pyHandle); } string realname = mod_name; if (mod_name.StartsWith("CLR.")) { realname = mod_name.Substring(4); string msg = String.Format("Importing from the CLR.* namespace " + "is deprecated. Please import '{0}' directly.", realname); Exceptions.deprecation(msg); } string[] names = realname.Split('.'); // Now we need to decide if the name refers to a CLR module, // and may have to do an implicit load (for b/w compatibility) // using the AssemblyManager. The assembly manager tries // really hard not to use Python objects or APIs, because // parts of it can run recursively and on strange threads. // // It does need an opportunity from time to time to check to // see if sys.path has changed, in a context that is safe. Here // we know we have the GIL, so we'll let it update if needed. AssemblyManager.UpdatePath(); AssemblyManager.LoadImplicit(realname); if (!AssemblyManager.IsValidNamespace(realname)) { return(Runtime.PyObject_Call(py_import, args, kw)); } // See if sys.modules for this interpreter already has the // requested module. If so, just return the exising module. IntPtr modules = Runtime.PyImport_GetModuleDict(); IntPtr module = Runtime.PyDict_GetItem(modules, py_mod_name); if (module != IntPtr.Zero) { if (fromlist) { Runtime.Incref(module); return(module); } module = Runtime.PyDict_GetItemString(modules, names[0]); Runtime.Incref(module); return(module); } Exceptions.Clear(); // Traverse the qualified module name to get the named module // and place references in sys.modules as we go. Note that if // we are running in interactive mode we pre-load the names in // each module, which is often useful for introspection. If we // are not interactive, we stick to just-in-time creation of // objects at lookup time, which is much more efficient. // NEW: The clr got a new module variable preload. You can // enable preloading in a non-interactive python processing by // setting clr.preload = True ModuleObject head = (mod_name == realname) ? null : root; ModuleObject tail = root; root.InitializePreload(); for (int i = 0; i < names.Length; i++) { string name = names[i]; ManagedType mt = tail.GetAttribute(name, true); if (!(mt is ModuleObject)) { string error = String.Format("No module named {0}", name); Exceptions.SetError(Exceptions.ImportError, error); return(IntPtr.Zero); } if (head == null) { head = (ModuleObject)mt; } tail = (ModuleObject)mt; if (CLRModule.preload) { tail.LoadNames(); } Runtime.PyDict_SetItemString(modules, tail.moduleName, tail.pyHandle ); } ModuleObject mod = fromlist ? tail : head; if (fromlist && Runtime.PySequence_Size(fromList) == 1) { IntPtr fp = Runtime.PySequence_GetItem(fromList, 0); if ((!CLRModule.preload) && Runtime.GetManagedString(fp) == "*") { mod.LoadNames(); } Runtime.Decref(fp); } Runtime.Incref(mod.pyHandle); return(mod.pyHandle); }