Gregory P. Smith <[email protected]> added the comment:
the pure python functools.lru_cache doesn't get this right either. here's a
desirable testcase for this bug:
```
def test_lru_defaults_bug44003(self):
@self.module.lru_cache(maxsize=None)
def func(arg='ARG', *, kw='KW'):
return arg, kw
self.assertEqual(func.__wrapped__.__defaults__, ('ARG',))
self.assertEqual(func.__wrapped__.__kwdefaults__, {'kw': 'KW'})
self.assertEqual(func.__defaults__, ('ARG',))
self.assertEqual(func.__kwdefaults__, {'kw': 'KW'})
```
results in
```
ERROR: test_lru_defaults_bug44003 (test.test_functools.TestLRUC)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/Users/greg/oss/python/gpshead/Lib/test/test_functools.py", line 1738,
in test_lru_defaults_bug44003
self.assertEqual(func.__defaults__, ('ARG',))
AttributeError: 'functools._lru_cache_wrapper' object has no attribute
'__defaults__'
======================================================================
FAIL: test_lru_defaults_bug44003 (test.test_functools.TestLRUPy)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/Users/greg/oss/python/gpshead/Lib/test/test_functools.py", line 1738,
in test_lru_defaults_bug44003
self.assertEqual(func.__defaults__, ('ARG',))
AssertionError: None != ('ARG',)
```
----------
_______________________________________
Python tracker <[email protected]>
<https://bugs.python.org/issue44003>
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