Added kw_only parameter to make_dataclasses. (GH-29679)
(cherry picked from commit f7638dd0f90b2afd9295ee179119f4a29859953a)
Co-authored-by: Eric V. Smith <ericvsmith@users.noreply.github.com>
diff --git a/Lib/dataclasses.py b/Lib/dataclasses.py
index aa84f1b..4f4aa3d 100644
--- a/Lib/dataclasses.py
+++ b/Lib/dataclasses.py
@@ -1326,7 +1326,7 @@ def _astuple_inner(obj, tuple_factory):
def make_dataclass(cls_name, fields, *, bases=(), namespace=None, init=True,
repr=True, eq=True, order=False, unsafe_hash=False,
- frozen=False, match_args=True, slots=False):
+ frozen=False, match_args=True, kw_only=False, slots=False):
"""Return a new dynamically created dataclass.
The dataclass name will be 'cls_name'. 'fields' is an iterable
@@ -1393,7 +1393,7 @@ def exec_body_callback(ns):
# Apply the normal decorator.
return dataclass(cls, init=init, repr=repr, eq=eq, order=order,
unsafe_hash=unsafe_hash, frozen=frozen,
- match_args=match_args, slots=slots)
+ match_args=match_args, kw_only=kw_only, slots=slots)
def replace(obj, /, **changes):
diff --git a/Lib/test/test_dataclasses.py b/Lib/test/test_dataclasses.py
index bbbb8e6..b00d048 100644
--- a/Lib/test/test_dataclasses.py
+++ b/Lib/test/test_dataclasses.py
@@ -3864,5 +3864,16 @@ class A:
c: int = 1
d: int
+ def test_make_dataclass(self):
+ A = make_dataclass("A", ['a'], kw_only=True)
+ self.assertTrue(fields(A)[0].kw_only)
+
+ B = make_dataclass("B",
+ ['a', ('b', int, field(kw_only=False))],
+ kw_only=True)
+ self.assertTrue(fields(B)[0].kw_only)
+ self.assertFalse(fields(B)[1].kw_only)
+
+
if __name__ == '__main__':
unittest.main()