df79943f-4aee-4531-a00d-c6b12816eb70
commented
3 years ago The only way to lookup weak references to functools.partial objects is with weakref.getweakrefs. I don't know if it's normal for extension types that define tpweaklistoffset to not add a \_weakref descriptor, but I figured at the very least a subtype specifying "__weakref" in its __slots could get one. Instead, it fails with the partially true TypeError: __weakref slot disallowed: either we already got one, or __itemsize__ != 0.
Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.
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GitHub fields: ```python assignee = None closed_at = None created_at =
labels = ['type-bug', '3.8']
title = 'functools.partial missing __weakref__ descriptor?'
updated_at =
user = 'https://github.com/mr-nfamous'
```
bugs.python.org fields:
```python
activity =
actor = 'rhettinger'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = []
creation =
creator = 'bup'
dependencies = []
files = []
hgrepos = []
issue_num = 43341
keywords = []
message_count = 1.0
messages = ['387781']
nosy_count = 2.0
nosy_names = ['rhettinger', 'bup']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue43341'
versions = ['Python 3.8']
```