From 4c2e383d4df529e51c2794c5ee887d1cbd87591f Mon Sep 17 00:00:00 2001
From: Andrei <matzipan@gmail.com>
Date: Fri, 13 Oct 2017 15:27:28 +0200
Subject: [PATCH] Fix regression with empty package names #4111

---
 mypy/fastparse.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mypy/fastparse.py b/mypy/fastparse.py
index cb1eeba02c20..0498a21a327d 100644
--- a/mypy/fastparse.py
+++ b/mypy/fastparse.py
@@ -651,7 +651,7 @@ def visit_Import(self, n: ast3.Import) -> Import:
     def visit_ImportFrom(self, n: ast3.ImportFrom) -> ImportBase:
         assert n.level is not None
         if len(n.names) == 1 and n.names[0].name == '*':
-            assert n.module is not None
+            assert n.module is not ''
             i = ImportAll(n.module, n.level)  # type: ImportBase
         else:
             i = ImportFrom(self.translate_module_id(n.module) if n.module is not None else '',