Add transformers id to hub requests (#10811)

* add uuid.hext to user_agent

* add log

* changed order of it

* renamed as session id

* renamed variable

* reverted naming of the const

src/transformers/file_utils.py

@@ -37,6 +37,7 @@ from pathlib import Path
 from types import ModuleType
 from typing import Any, BinaryIO, Dict, List, Optional, Tuple, Union
 from urllib.parse import urlparse
+from uuid import uuid4
 from zipfile import ZipFile, is_zipfile
 
 import numpy as np
@@ -217,6 +218,7 @@ if (
 PYTORCH_PRETRAINED_BERT_CACHE = os.getenv("PYTORCH_PRETRAINED_BERT_CACHE", default_cache_path)
 PYTORCH_TRANSFORMERS_CACHE = os.getenv("PYTORCH_TRANSFORMERS_CACHE", PYTORCH_PRETRAINED_BERT_CACHE)
 TRANSFORMERS_CACHE = os.getenv("TRANSFORMERS_CACHE", PYTORCH_TRANSFORMERS_CACHE)
+SESSION_ID = uuid4().hex
 DISABLE_TELEMETRY = os.getenv("DISABLE_TELEMETRY", False)
 
 WEIGHTS_NAME = "pytorch_model.bin"
@@ -1215,7 +1217,7 @@ def http_user_agent(user_agent: Union[Dict, str, None] = None) -> str:
     """
     Formats a user-agent string with basic info about a request.
     """
-    ua = "transformers/{}; python/{}".format(__version__, sys.version.split()[0])
+    ua = f"transformers/{__version__}; python/{sys.version.split()[0]}; session_id/{SESSION_ID}"
     if is_torch_available():
         ua += f"; torch/{_torch_version}"
     if is_tf_available():