Fix a bug with version_info, fixes #1477

jedi/inference/names.py

@@ -634,7 +634,7 @@ class StubName(StubNameMixin, TreeNameDefinition):
         inferred = super(StubName, self).infer()
         if self.string_name == 'version_info' and self.get_root_context().py__name__() == 'sys':
             from jedi.inference.gradual.stub_value import VersionInfo
-            return [VersionInfo(c) for c in inferred]
+            return ValueSet(VersionInfo(c) for c in inferred)
         return inferred
 
 

test/test_api/test_documentation.py

@@ -75,3 +75,17 @@ def test_attribute_docstrings(goto_or_help, expected_doc, to_execute):
 
     d, = goto_or_help(code + to_execute)
     assert d.docstring() == expected_doc
+
+
+def test_version_info(Script):
+    """
+    Version info is a bit special, because it needs to be fast for some ifs, so
+    it's a special object that we have to check.
+    """
+    s = Script(dedent("""\
+        import sys
+
+        sys.version_info"""))
+
+    c, = s.completions()
+    assert c.docstring() == 'sys.version_info\n\nVersion information as a named tuple.'