feat: add version API and expose package version

Adds:
- ollama.__version__  for the installed package version
- .version() method on Client and AsyncClient to fetch /api/version
Includes tests.

Closes #646

ollama/__init__.py

@@ -1,4 +1,4 @@
-from ollama._client import AsyncClient, Client
+from ollama._client import AsyncClient, Client, __version__
 from ollama._types import (
   ChatResponse,
   EmbeddingsResponse,
@@ -23,6 +23,8 @@ __all__ = [
   'AsyncClient',
   'ChatResponse',
   'Client',
+  '__version__',
+  'version',
   'EmbedResponse',
   'EmbeddingsResponse',
   'GenerateResponse',
@@ -55,5 +57,6 @@ list = _client.list
 copy = _client.copy
 show = _client.show
 ps = _client.ps
+version = _client.version
 web_search = _client.web_search
 web_fetch = _client.web_fetch

ollama/_client.py

@@ -628,6 +628,16 @@ class Client(BaseClient):
       'GET',
       '/api/tags',
     )
+  
+  def version(self) -> str:
+    r = self._request_raw(
+      'GET',
+      '/api/version'
+    )
+    if r.status_code != 200:
+      raise Exception(f"Request failed: {r.status_code}")
+
+    return r.json().get('version', '')
 
   def delete(self, model: str) -> StatusResponse:
     r = self._request_raw(
@@ -1270,6 +1280,18 @@ class AsyncClient(BaseClient):
       '/api/tags',
     )
 
+  async def version(self) -> str:
+    r = await self._request_raw(
+      'GET',
+      '/api/version',
+    )
+
+    if r.status_code != 200:
+      raise Exception(f"Request failed: {r.status_code}")
+    
+    return r.json().get('version', '')
+  
+
   async def delete(self, model: str) -> StatusResponse:
     r = await self._request_raw(
       'DELETE',

tests/test_client.py

@@ -5,7 +5,7 @@ import re
 import tempfile
 from pathlib import Path
 from typing import Any
-
+import ollama
 import pytest
 from httpx import Response as httpxResponse
 from pydantic import BaseModel
@@ -99,6 +99,50 @@ def test_client_chat_with_logprobs(httpserver: HTTPServer):
   assert response['logprobs'][0]['top_logprobs'][1]['token'] == 'Hi'
 
 
+def test_package_version():
+  assert hasattr(ollama, '__version__')
+  assert isinstance(ollama.__version__, str)
+  assert ollama.__version__ != ''
+  assert callable(ollama.version)
+  assert hasattr(ollama, 'version')
+
+
+def test_client_version_missing_field(httpserver: HTTPServer):
+  httpserver.expect_ordered_request(
+    '/api/version',
+    method='GET',
+  ).respond_with_json({})
+
+  client = Client(httpserver.url_for('/'))
+  response = client.version()
+  assert response == ''
+
+
+async def test_async_client_version(httpserver: HTTPServer):
+  httpserver.expect_ordered_request(
+    '/api/version',
+    method='GET',
+  ).respond_with_json(
+    {
+      'version': '0.1.0',
+    }
+  )
+
+  client = AsyncClient(httpserver.url_for('/'))
+  response = await client.version()
+  assert response == '0.1.0'
+  assert isinstance(response, str)
+
+async def test_async_client_version_missing_field(httpserver: HTTPServer):
+  httpserver.expect_ordered_request(
+    '/api/version',
+    method='GET',
+  ).respond_with_json({})
+
+  client = AsyncClient(httpserver.url_for('/'))
+  response = await client.version()
+  assert response == ''
+
 def test_client_chat_stream(httpserver: HTTPServer):
   def stream_handler(_: Request):
     def generate():