Allow check_transformers_install to warn and pass if NM fork isn't used (#1101)

* Allow check_transformers_install to warn and pass if NM fork isn't used

* .

* Update src/deepsparse/transformers/__init__.py

Co-authored-by: Benjamin Fineran <[email protected]>

---------

Co-authored-by: Benjamin Fineran <[email protected]>

Author: 2 people

src/deepsparse/transformers/__init__.py

@@ -41,9 +41,9 @@
 def _check_transformers_install():
     import transformers as _transformers
 
-    if not _transformers.NM_INTEGRATED:
+    if not getattr(_transformers, "NM_INTEGRATED", False):
         _LOGGER.warning(
-            "the neuralmagic fork of transformers may not be installed. it can be "
+            "The neuralmagic fork of transformers may not be installed. It can be "
             f"installed via `pip install {nm_transformers}`"
         )