fix: Resolve the package of class/module symbols from the declaring file

packages/pyright-scip/snapshots/input/external_class_import/external_class.py

@@ -0,0 +1,10 @@
+import widgets
+from widgets import Widget
+
+
+def render(name: str, width: int) -> str:
+    widget: widgets.Widget = widgets.Widget(name, width=width)
+    try:
+        return widgets.Widget.render(widget, prefix="> ")
+    except widgets.WidgetError:
+        return ""

packages/pyright-scip/snapshots/input/external_class_import/pyrightconfig.json

@@ -0,0 +1,4 @@
+{
+    "pythonVersion": "3.11",
+    "extraPaths": ["../../site-packages"]
+}

packages/pyright-scip/snapshots/output/external_class_import/external_class.py

@@ -0,0 +1,37 @@
+# < definition scip-python python snapshot-util 0.1 external_class/__init__:
+
+import widgets
+#      ^^^^^^^ reference  widgets 1.2.3 widgets/__init__:
+from widgets import Widget
+#    ^^^^^^^ reference  widgets 1.2.3 widgets/__init__:
+#                   ^^^^^^ reference  widgets 1.2.3 `widgets.models`/Widget#
+
+
+def render(name: str, width: int) -> str:
+#   ^^^^^^ definition  snapshot-util 0.1 external_class/render().
+#          ^^^^ definition  snapshot-util 0.1 external_class/render().(name)
+#                ^^^ reference  python-stdlib 3.11 builtins/str#
+#                     ^^^^^ definition  snapshot-util 0.1 external_class/render().(width)
+#                            ^^^ reference  python-stdlib 3.11 builtins/int#
+#                                    ^^^ reference  python-stdlib 3.11 builtins/str#
+    widget: widgets.Widget = widgets.Widget(name, width=width)
+#   ^^^^^^ definition local 0
+#           ^^^^^^^ reference  widgets 1.2.3 widgets/__init__:
+#                   ^^^^^^ reference  widgets 1.2.3 `widgets.models`/Widget#
+#                            ^^^^^^^ reference  widgets 1.2.3 widgets/__init__:
+#                                    ^^^^^^ reference  widgets 1.2.3 `widgets.models`/Widget#
+#                                           ^^^^ reference  snapshot-util 0.1 external_class/render().(name)
+#                                                 ^^^^^ reference  widgets 1.2.3 `widgets.models`/Widget#__init__().(width)
+#                                                       ^^^^^ reference  snapshot-util 0.1 external_class/render().(width)
+    try:
+        return widgets.Widget.render(widget, prefix="> ")
+#              ^^^^^^^ reference  widgets 1.2.3 widgets/__init__:
+#                      ^^^^^^ reference  widgets 1.2.3 `widgets.models`/Widget#
+#                             ^^^^^^ reference  widgets 1.2.3 `widgets.models`/Widget#render().
+#                                    ^^^^^^ reference local 0
+#                                            ^^^^^^ reference  widgets 1.2.3 `widgets.models`/Widget#render().(prefix)
+    except widgets.WidgetError:
+#          ^^^^^^^ reference  widgets 1.2.3 widgets/__init__:
+#                  ^^^^^^^^^^^ reference  widgets 1.2.3 `widgets.models`/WidgetError#
+        return ""
+

packages/pyright-scip/snapshots/site-packages/widgets/__init__.py

@@ -0,0 +1,3 @@
+from .models import Widget, WidgetError
+
+__all__ = ["Widget", "WidgetError"]

packages/pyright-scip/snapshots/site-packages/widgets/models.py

@@ -0,0 +1,11 @@
+class WidgetError(Exception):
+    pass
+
+
+class Widget:
+    def __init__(self, name: str, width: int = 0) -> None:
+        self.name = name
+        self.width = width
+
+    def render(self, prefix: str = "") -> str:
+        return prefix + self.name

packages/pyright-scip/snapshots/testEnv.json

@@ -13,5 +13,10 @@
         "name": "sqlparse",
         "version": "0.4.2",
         "files": []
+    },
+    {
+        "name": "widgets",
+        "version": "1.2.3",
+        "files": ["widgets/__init__.py", "widgets/models.py"]
     }
 ]

packages/pyright-scip/src/treeVisitor.ts

@@ -1123,7 +1123,13 @@ export class TreeVisitor extends ParseTreeWalker {
                                 const bound = typeVar.details.boundType! as ClassType;
 
                                 return this.getSymbolOnce(node, () => {
-                                    const pythonPackage = this.getPackageInfo(node, bound.details.moduleName)!;
+                                    const pythonPackage = this.guessPackage(
+                                        bound.details.moduleName,
+                                        bound.details.filePath
+                                    );
+                                    if (!pythonPackage) {
+                                        return ScipSymbol.local(this.counter.next());
+                                    }
                                     let symbol = Symbols.makeTerm(
                                         Symbols.makeType(
                                             Symbols.makeModule(pythonPackage, bound.details.moduleName),
@@ -1343,7 +1349,12 @@ export class TreeVisitor extends ParseTreeWalker {
             }
             return this.getFunctionSymbol(decl);
         } else if (Types.isClass(typeObj)) {
-            const pythonPackage = this.getPackageInfo(node, typeObj.details.moduleName)!;
+            // The package comes from the declaring file. `node` is the referencing
+            // site, which is in the project whenever a project file is visited.
+            const pythonPackage = this.guessPackage(typeObj.details.moduleName, typeObj.details.filePath);
+            if (!pythonPackage) {
+                return ScipSymbol.local(this.counter.next());
+            }
             return Symbols.makeClass(pythonPackage, typeObj.details.moduleName, node.value);
         } else if (Types.isClassInstance(typeObj)) {
             typeObj = typeObj as ClassType;
@@ -1352,7 +1363,10 @@ export class TreeVisitor extends ParseTreeWalker {
         } else if (Types.isTypeVar(typeObj)) {
             throw 'typevar';
         } else if (Types.isModule(typeObj)) {
-            const pythonPackage = this.getPackageInfo(node, typeObj.moduleName)!;
+            const pythonPackage = this.guessPackage(typeObj.moduleName, typeObj.filePath);
+            if (!pythonPackage) {
+                return ScipSymbol.local(this.counter.next());
+            }
             return Symbols.makeModuleInit(pythonPackage, typeObj.moduleName);
         } else if (Types.isOverloadedFunction(typeObj)) {
             if (!typeObj.overloads) {