--- checker.py	2016-12-08 16:10:49.314419009 -0800
+++ checker.newnew	2016-12-08 15:53:40.006418997 -0800
@@ -593,7 +593,7 @@
             # Look for imported names that aren't used.
             for value in scope.values():
                 if isinstance(value, Importation):
-                    used = value.used or value.name in all_names
+                    used = value.used or value.name in all_names or scope.importStarred
                     if not used:
                         messg = messages.UnusedImport
                         self.report(messg, value.source, str(value))
@@ -732,15 +732,16 @@
 
             for scope in self.scopeStack[-1::-1]:
                 for binding in scope.values():
-                    if isinstance(binding, StarImportation):
+                    if isinstance(binding, StarImportation) and not binding.verified:
                         # mark '*' imports as used for each scope
                         binding.used = (self.scope, node)
                         from_list.append(binding.fullName)
 
             # report * usage, with a list of possible sources
-            from_list = ', '.join(sorted(from_list))
-            self.report(messages.ImportStarUsage, node, name, from_list)
-            return
+            if from_list:
+                from_list = ', '.join(sorted(from_list))
+                self.report(messages.ImportStarUsage, node, name, from_list)
+                return
 
         if name == '__path__' and os.path.basename(self.filename) == '__init__.py':
             # the special name __path__ is valid only in packages
@@ -1271,10 +1272,23 @@
                     self.report(messages.ImportStarNotPermitted,
                                 node, module)
                     continue
-
+                for p in sys.path:
+                    if os.path.exists(os.path.join(p, module)):
+                        __all__ = {}
+                        exec('from %s import *' % module, {}, __all__)
+                        for n in sorted(__all__):
+                            self.addBinding(
+                                    node,
+                                    ImportationFrom(n, node, module, n),
+                                    )
+                        verified = True
+                        break
+                else:
+                    self.report(messages.ImportStarUsed, node, module)
+                    verified = False
                 self.scope.importStarred = True
-                self.report(messages.ImportStarUsed, node, module)
                 importation = StarImportation(module, node)
+                importation.verified = verified
             else:
                 importation = ImportationFrom(name, node,
                                               module, alias.name)