bpo-38431: Fix __repr__ method of InitVar to work with typing objects. (GH-16702)
diff --git a/Lib/dataclasses.py b/Lib/dataclasses.py
index 9135b07..91c1f6f 100644
--- a/Lib/dataclasses.py
+++ b/Lib/dataclasses.py
@@ -206,7 +206,12 @@
self.type = type
def __repr__(self):
- return f'dataclasses.InitVar[{self.type.__name__}]'
+ if isinstance(self.type, type):
+ type_name = self.type.__name__
+ else:
+ # typing objects, e.g. List[int]
+ type_name = repr(self.type)
+ return f'dataclasses.InitVar[{type_name}]'
def __class_getitem__(cls, type):
return InitVar(type)
diff --git a/Lib/test/test_dataclasses.py b/Lib/test/test_dataclasses.py
index 037bf4c..238335e 100644
--- a/Lib/test/test_dataclasses.py
+++ b/Lib/test/test_dataclasses.py
@@ -1102,6 +1102,8 @@
# Make sure the repr is correct.
self.assertEqual(repr(InitVar[int]), 'dataclasses.InitVar[int]')
+ self.assertEqual(repr(InitVar[List[int]]),
+ 'dataclasses.InitVar[typing.List[int]]')
def test_init_var_inheritance(self):
# Note that this deliberately tests that a dataclass need not