Minor simplification of values-gathering

pydantic · Jul 15, 2019 · 0fb7f23 · 0fb7f23
1 parent a43c7dc
commit 0fb7f23
Showing 1 changed file with 3 additions and 2 deletions.
diff --git a/pydantic/fields.py b/pydantic/fields.py
@@ -197,8 +197,9 @@ def _populate_sub_fields(self) -> None:  # noqa: C901 (ignore complexity)
             # python 3.7 only, Pattern is a typing object but without sub fields
             return
         if is_literal_type(self.type_):
-            if len(literal_values(self.type_)) > 1:
-                self.type_ = Union[tuple(Literal[value] for value in literal_values(self.type_))]
+            values = literal_values(self.type_)
+            if len(values) > 1:
+                self.type_ = Union[tuple(Literal[value] for value in values)]
             else:
                 return
         origin = getattr(self.type_, '__origin__', None)