dev(narugo): add more docs in README.md

README.md

@@ -156,6 +156,19 @@ hfutils download -h
 
 ```
 
+## Supported Formats
+
+By default, we support the `zip` and `tar` formats, including `.zip`, `.tar`, `.tar.gz`, `.tar.bz2`, and `.tar.xz`.
+
+If you require support for `rar` and `7z` files, install the extra dependencies using the following command:
+
+```shell
+pip install hfutils[rar,7z]
+```
+
+**NOTE:** Creating RAR archive files is not supported. We use the [rarfile](https://github.com/markokr/rarfile) library,
+which lacks the functionality for creating RAR files.
+
 ## How to Access Private Repositories
 
 Simply configure the `HF_TOKEN` environment variable by using your HuggingFace access token.

hfutils/archive/__init__.py

@@ -5,6 +5,17 @@
 Supported Formats:
 
     .. include:: supported_types.demo.py.txt
+
+.. note::
+    If you require support for 7z and RAR formats, simply install ``hfutils`` using the following code:
+
+    .. code:: shell
+
+        pip install hfutils[7z]
+        pip install hfutils[rar]
+
+.. warning::
+    The creation of archive files in the RAR format is not supported, as we utilize the `rarfile <https://github.com/markokr/rarfile>`_ library, which does not offer functionality for creating RAR files.
 """
 from .base import register_archive_type, archive_pack, archive_unpack, get_archive_type, get_archive_extname
 from .rar import _rar_pack, _rar_unpack