Import integration libraries first (huggingface#7650)

* Import intergration libraries first

* isort and black happiness

* flake8 happiness

* Add a test

* Black reformat

* Ignore import order in tests

* A heavy-handed method of disabling comet for tests

* Remove comet_ml tests

* Run black on setup.py

Author: dsblank

setup.py

@@ -134,9 +134,7 @@
         "sacremoses",
     ],
     extras_require=extras,
-    entry_points={
-        "console_scripts": ["transformers-cli=transformers.commands.transformers_cli:main"]
-    },
+    entry_points={"console_scripts": ["transformers-cli=transformers.commands.transformers_cli:main"]},
     python_requires=">=3.6.0",
     classifiers=[
         "Development Status :: 5 - Production/Stable",

src/transformers/integrations.py

@@ -2,13 +2,11 @@
 import math
 import os
 
-from .file_utils import is_torch_tpu_available
-from .trainer_callback import TrainerCallback
-from .trainer_utils import PREFIX_CHECKPOINT_DIR, BestRun
-from .utils import logging
 
+# Import 3rd-party integrations first:
 
 try:
+    # Comet needs to be imported before any ML frameworks
     import comet_ml  # noqa: F401
 
     _has_comet = True
@@ -53,6 +51,14 @@
     except ImportError:
         _has_tensorboard = False
 
+# No transformer imports above this point
+
+from .file_utils import is_torch_tpu_available
+from .trainer_callback import TrainerCallback
+from .trainer_utils import PREFIX_CHECKPOINT_DIR, BestRun
+from .utils import logging
+
+
 logger = logging.get_logger(__name__)