Make openai dependency optional (#236)

* Make openai optional dependency

* Set openai as an extra dependency

pyproject.toml

@@ -23,7 +23,6 @@ dependencies = [
   "duckduckgo-search>=6.3.7",
   "python-dotenv>=1.0.1",
   "e2b-code-interpreter>=1.0.3",
-  "openai>=1.58.1",
 ]
 
 [project.optional-dependencies]
@@ -37,12 +36,13 @@ torch = [
 litellm = [
   "litellm>=1.55.10",
 ]
+openai = ["openai>=1.58.1"]
 quality = [
   "ruff>=0.9.0",
 ]
 test = [
   "pytest>=8.1.0",
-  "smolagents[audio,litellm,torch]",
+  "smolagents[audio,litellm,openai,torch]",
 ]
 dev = [
   "smolagents[quality,test]",

src/smolagents/models.py

@@ -34,8 +34,6 @@ from transformers import (
 )
 from transformers.utils.import_utils import _is_package_available
 
-import openai
-
 from .tools import Tool
 
 logger = logging.getLogger(__name__)
@@ -578,6 +576,12 @@ class OpenAIServerModel(Model):
         api_key: str,
         **kwargs,
     ):
+        try:
+            import openai
+        except ModuleNotFoundError:
+            raise ModuleNotFoundError(
+                "Please install 'openai' extra to use OpenAIServerModel: `pip install 'smolagents[openai]'`"
+            ) from None
         super().__init__()
         self.model_id = model_id
         self.client = openai.OpenAI(