make fixup

src/transformers/utils/import_utils.py

@@ -57,12 +57,13 @@ def _is_package_available(pkg_name: str, return_version: bool = False) -> Union[
                         package_version = temp_version
                         package_exists = True
                     else:
-                        package_exists = False
+                        package_version = "N/A"
                 except ImportError:
                     # If the package can't be imported, it's not available
-                    package_exists = False
-            else:
-                # For packages other than "torch", don't attempt the fallback and set as not available
+                    package_version = "N/A"
+            elif return_version:
+                # For packages other than "torch", don't attempt the fallback
+                # However, we only mark the package as not available if the version is explicitly requested
                 package_exists = False
         logger.debug(f"Detected {pkg_name} version: {package_version}")
     if return_version:
@@ -173,6 +174,14 @@ _torch_version = "N/A"
 _torch_available = False
 if USE_TORCH in ENV_VARS_TRUE_AND_AUTO_VALUES and USE_TF not in ENV_VARS_TRUE_VALUES:
     _torch_available, _torch_version = _is_package_available("torch", return_version=True)
+    if _torch_available and _torch_version == "N/A":
+        # Here we have the situation where the import package for torch exists, but we can't
+        # find the distribution package containing its version data. In this case, we import it and ask it directly.
+        import torch
+
+        _torch_version = torch.__version__
+        if "+" in _torch_version:
+            torch_version = _torch_version.split("+")[0]
 else:
     logger.info("Disabling PyTorch because USE_TF is set")
     _torch_available = False