Fixed bug that results in a false positive "missing stub file" diagno…

packages/pyright-internal/src/analyzer/binder.ts

@@ -386,12 +386,32 @@ export class Binder extends ParseTreeWalker {
             return true;
         }
 
-        // A source file was found, but the type stub was missing.
+        // See if a source file was found but it's not part of a py.typed
+        // library and no type stub is found.
+        let reportStubMissing = false;
         if (
             !importResult.isStubFile &&
             importResult.importType === ImportType.ThirdParty &&
             !importResult.pyTypedInfo
         ) {
+            reportStubMissing = true;
+
+            // If the import is a namespace package, it's possible that all of
+            // the targeted import symbols are py.typed submodules. In this case,
+            // suppress the missing stub diagnostic.
+            if (importResult.isNamespacePackage && node.parent?.nodeType === ParseNodeType.ImportFrom) {
+                if (
+                    node.parent.d.imports.every((importAs) => {
+                        const implicitImport = importResult.filteredImplicitImports.get(importAs.d.name.d.value);
+                        return !!implicitImport?.pyTypedInfo;
+                    })
+                ) {
+                    reportStubMissing = false;
+                }
+            }
+        }
+
+        if (reportStubMissing) {
             const diagnostic = this._addDiagnostic(
                 DiagnosticRule.reportMissingTypeStubs,
                 LocMessage.stubFileMissing().format({ importName: importResult.importName }),