chore(medcat): CU-869a98zwq: use old name (#118)

* chore(medcat): CU-869a98zwq: use old name

* Update README with tutorial link and quick ref guide

* chore(medcat): CU-869a98zwq: fixl lint

---------

Co-authored-by: Tom Searle <[email protected]>

Author: tomolopolis

medcat-v2/README.md

@@ -21,7 +21,21 @@ Original paper for v1 on [arXiv](https://arxiv.org/abs/2010.01165).
 As MedCAT v2 is still in early release, we do not currently have any models publically available.
 You can still use models for v1, however (see the [README](https://github.com/CogStack/cogstack-nlp/blob/main/medcat-v2/README.md) there).
 
-If you wish you can also convert the v1 models into the v2 format (see tutorial (TODO + link)).
+If you wish you can also convert the v1 models into the v2 format (see [tutorial](https://github.com/CogStack/cogstack-nlp/blob/main/medcat-v2-tutorials/notebooks/introductory/migration/1._Migrate_v1_model_to_v2.ipynb)).
+
+```python
+from medcat.utils.legacy import legacy_converter
+from medcat.storage.serialisers import AvailableSerialisers
+old_model = '<path to old v1 model>'
+new_model_dir = '<dir to place new model in>'
+legacy_converter.do_conversion(old_model_path, new_model_dir, AvailableSerialisers.dill)
+```
+OR
+```bash
+model_path = "models/medcat1_model_pack.zip"
+new_model_folder = "models"  # file in this folder
+! python -m  medcat.utils.legacy.legacy_converter $model_path $new_model_folder --verbose
+```
 
 ## News
 - **MedCAT 2.0.0**  was released 18. August 2025.

medcat-v2/medcat/utils/legacy/conversion_all.py

@@ -31,6 +31,7 @@ def __init__(self, medcat1_model_pack_path: str,
                  ser_type: AvailableSerialisers = AvailableSerialisers.dill):
         if medcat1_model_pack_path.endswith(".zip"):
             folder_path = medcat1_model_pack_path[:-4]
+            self.old_model_name = os.path.split(medcat1_model_pack_path)[1]
             unpack(medcat1_model_pack_path, folder_path)
             medcat1_model_pack_path = folder_path
         if not os.path.isdir(medcat1_model_pack_path):
@@ -147,6 +148,7 @@ def convert(self) -> CAT:
             logger.info("Saving converted model to '%s'",
                         self.new_model_folder)
             cat.save_model_pack(self.new_model_folder,
+                                pack_name=self.old_model_name + 'v2',
                                 serialiser_type=self.ser_type)
         return cat