[FEATURE] Please add generics

[spacether]

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Please add generics to frozendict
One should be able to define frozendict key and value types like so:

>>> import frozendict
>>> f = frozendict.frozendict[str, int]
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: 'type' object is not subscriptable

this works

>>> import typing
>>> f = typing.Dict[str, int]

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Related:

• Generics? slezica/python-frozendict#27
• Generics? corenting/immutabledict#41

[Marco-Sulla]

frozendict is a C extension, so support for generics is for Python 3.9+:

marco@buzz:~/sources/python-frozendict$ . venv_3_8/bin/activate
(venv_3_8) marco@buzz:~/sources/python-frozendict$ python
Python 3.8.17 (tags/v3.8.17-dirty:9a2d5311d1, Jun 24 2023, 14:15:31) 
[GCC 11.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import frozendict
>>> frozendict.frozendict[str, int]
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: 'type' object is not subscriptable
>>> dict[str, int]
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: 'type' object is not subscriptable
>>> 
(venv_3_8) marco@buzz:~/sources/python-frozendict$ deactivate 
marco@buzz:~/sources/python-frozendict$ . venv_3_9/bin/activate
(venv_3_9) marco@buzz:~/sources/python-frozendict$ python
Python 3.9.17 (tags/v3.9.17-dirty:0d3cd4eb66, Jun 24 2023, 14:33:23) 
[GCC 11.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import frozendictint
>>> frozendict.frozendict[str, int]
frozendict.frozendict[str, int]
>>> dict[str, int]
dict[str, int]
>>>

immutabledict is a pure py implementation. frozendict has also a pure py implementation, and I can add generics to it for all supported py versions.

The question is: is it worth it? Python 3.8 EOL is in 14 Oct 2024. Consider to upgrade your Python. Python 3.10-3.11 are really faster.

If you can't, I can consider to add it to my TODO list (after implementing C extension for 3.11 and deepfreeze).