PY-83412 Don't complete module and package names in assignment targets

GitOrigin-RevId: 1036be445b42c78ab555b0cd376e57fcebca9248

python/python-psi-impl/src/com/jetbrains/python/codeInsight/completion/PyModuleNameCompletionContributor.kt

@@ -19,6 +19,7 @@ import com.jetbrains.python.codeInsight.completion.PythonCompletionWeigher.NOT_I
 import com.jetbrains.python.psi.PyFile
 import com.jetbrains.python.psi.PyImportStatementBase
 import com.jetbrains.python.psi.PyReferenceExpression
+import com.jetbrains.python.psi.PyTargetExpression
 import com.jetbrains.python.psi.resolve.fromFoothold
 import com.jetbrains.python.psi.resolve.resolveQualifiedName
 import com.jetbrains.python.psi.types.PyModuleType
@@ -97,6 +98,7 @@ class PyModuleNameCompletionContributor : CompletionContributor(), DumbAware {
 
     return parent is PyReferenceExpression
            && !parent.isQualified
+           && parameters.originalPosition?.parent !is PyTargetExpression
            && PsiTreeUtil.getParentOfType(element, PyImportStatementBase::class.java) == null
   }
 }

python/testData/completion/notImportedPackageName/PackageNameNotSuggestedForAssignmentTarget/main.py

@@ -0,0 +1 @@
+fooba<caret>_var = 42

python/testSrc/com/jetbrains/python/PyNotImportedPackageNameCompletionTest.java

@@ -12,6 +12,14 @@ public class PyNotImportedPackageNameCompletionTest extends PyTestCase {
     myFixture.checkResultByFile(testName + "/main.after.py");
   }
 
+  public void testPackageNameNotSuggestedForAssignmentTarget() {
+    final String testName = getTestName(false);
+    myFixture.copyDirectoryToProject(testName, "");
+    myFixture.configureByFile("main.py");
+    myFixture.completeBasic();
+    assertDoesntContain(myFixture.getLookupElementStrings(), "foobar");
+  }
+
   @Override
   protected String getTestDataPath() {
     return super.getTestDataPath() + "/completion/notImportedPackageName/";