Make the first dataclass example more useful (GH-19994)

diff --git a/Doc/library/dataclasses.rst b/Doc/library/dataclasses.rst
index c125a1130a960361bcf47db14e62db5b9e109701..fe63d20671dd744fc3ac87b54b1d98754acceb9f 100644 (file)
--- a/Doc/library/dataclasses.rst
+++ b/Doc/library/dataclasses.rst
@@ -19,6 +19,8 @@ in :pep:`557`.
 The member variables to use in these generated methods are defined
 using :pep:`526` type annotations.  For example this code::
 
+  from dataclasses import dataclass
+
   @dataclass
   class InventoryItem:
       '''Class for keeping track of an item in inventory.'''