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-rw-r--r--Lib/typing.py6
1 files changed, 3 insertions, 3 deletions
diff --git a/Lib/typing.py b/Lib/typing.py
index 0a685d3..5351883 100644
--- a/Lib/typing.py
+++ b/Lib/typing.py
@@ -1716,11 +1716,11 @@ def _make_nmtuple(name, types):
# attributes prohibited to set in NamedTuple class syntax
-_prohibited = ('__new__', '__init__', '__slots__', '__getnewargs__',
+_prohibited = {'__new__', '__init__', '__slots__', '__getnewargs__',
'_fields', '_field_defaults', '_field_types',
- '_make', '_replace', '_asdict', '_source')
+ '_make', '_replace', '_asdict', '_source'}
-_special = ('__module__', '__name__', '__annotations__')
+_special = {'__module__', '__name__', '__annotations__'}
class NamedTupleMeta(type):