Update Trainer API usage to remove environment variable (#406)

Author: qgallouedec

docs/source/transformers_integration.md

@@ -14,34 +14,29 @@ dataset = Dataset.from_dict({"input_ids": data, "labels": data})
 # Train a model using the Trainer API
 trainer = Trainer(
     model=AutoModelForCausalLM.from_pretrained("Qwen/Qwen3-0.6B"),
-    args=TrainingArguments(run_name="Qwen3-0.6B-training", report_to="trackio"),
+    args=TrainingArguments(report_to="trackio", run_name="Qwen3-0.6B-training"),
     train_dataset=dataset,
 )
 trainer.train()
 ```
 
 ## Configuring Project and Space
 
-You can specify your Trackio project name and space ID using environment variables:
-
-```sh
-export TRACKIO_PROJECT_NAME="my-project"
-export TRACKIO_SPACE_ID="username/space_id"
-```
-
-Or set them directly in Python:
+Set the project and space ID directly in your [`~transformers.TrainingArguments`]:
 
 ```python
-import os
+from transformers import TrainingArguments
 
-os.environ["TRACKIO_PROJECT_NAME"] = "my-project"
-os.environ["TRACKIO_SPACE_ID"] = "username/space_id"
-
-# rest of your code...
+args = TrainingArguments(
+    report_to="trackio",
+    run_name="my-run",
+    project="my-project",
+    trackio_space_id="username/space_id",
+)
 ```
 
 <iframe 
     src="https://trackio-documentation.hf.space/?project=transformers-integration&sidebar=hidden" 
     style="width: 100%; border:0;" 
     height="1530">
-</iframe>
+</iframe>

examples/transformers-integration.py

@@ -7,8 +7,6 @@
 # ]
 # ///
 
-import os
-
 import huggingface_hub
 from datasets import Dataset
 from transformers import (
@@ -31,8 +29,6 @@
 username = huggingface_hub.whoami()["name"]
 hub_model_id = f"{username}/trackio-transformers-demo"
 
-os.environ["TRACKIO_PROJECT"] = "trackio-transformers-demo"
-
 trainer = Trainer(
     model=model,
     args=TrainingArguments(
@@ -42,6 +38,7 @@
         learning_rate=2e-5,
         logging_steps=1,
         report_to="trackio",
+        project="trackio-transformers-demo",
         push_to_hub=bool(hub_model_id),
         hub_model_id=hub_model_id,
     ),