James 4fbeffcfee feat(core): add 'approximate' alias in place of count_tokens_approximately (#33045) ...

### Description: 
earlier we have to use like below:
```python
from langchain_core.messages import trim_messages
from langchain_core.messages.utils import count_tokens_approximately

trim_messages(..., token_counter=count_tokens_approximately)
```
Now can be used as like this also
```python
from langchain_core.messages import trim_messages

trim_messages(..., token_counter="approximate")
```
- [x] **Added tests**
- [x] **Lint and test**: Run this as I made change in langchain/core, uv
run --group test pytest tests/unit_tests/messages/test_utils.py -v
<img width="1006" height="66" alt="image"
src="https://github.com/user-attachments/assets/c6938c29-a781-4e7f-871b-8e888ee764b7"
/>

---------

Co-authored-by: Mason Daugherty <mason@langchain.dev>
Co-authored-by: Mason Daugherty <github@mdrxy.com>

2025-12-19 19:25:29 -06:00

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benchmarks

feat: Use uuid7 for run ids (#34172)

2025-12-03 10:09:10 -08:00

integration_tests

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unit_tests

feat(core): add 'approximate' alias in place of count_tokens_approximately (#33045)

2025-12-19 19:25:29 -06:00

__init__.py

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