Remove __future__ imports for legacy Python2 supports (pytorch#45033)

Summary:
There is a module called `2to3` which you can target for future specifically to remove these, the directory of `caffe2` has the most redundant imports:

```2to3 -f future -w caffe2```

Pull Request resolved: pytorch#45033

Reviewed By: seemethere

Differential Revision: D23808648

Pulled By: bugra

fbshipit-source-id: 38971900f0fe43ab44a9168e57f2307580d36a38

caffe2/contrib/aten/aten_test.py

@@ -1,7 +1,7 @@
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
+
+
+
+
 
 from caffe2.python import core, dyndep
 from hypothesis import given

caffe2/contrib/fakelowp/test/test_batchmatmul_nnpi_fp16.py

@@ -1,7 +1,7 @@
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
+
+
+
+
 
 import numpy as np
 import unittest

caffe2/contrib/fakelowp/test/test_batchnorm_nnpi_fp16.py

@@ -1,7 +1,7 @@
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
+
+
+
+
 
 import numpy as np
 import unittest

caffe2/contrib/fakelowp/test/test_deq_swish_quant_nnpi.py

@@ -1,4 +1,4 @@
-from __future__ import absolute_import, division, print_function, unicode_literals
+
 
 import numpy as np
 import caffe2.python.fakelowp.init_shared_libs  # noqa

caffe2/contrib/fakelowp/test/test_fc_nnpi_fp16.py

@@ -1,7 +1,7 @@
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
+
+
+
+
 
 import numpy as np
 import unittest

caffe2/contrib/fakelowp/test/test_fusions.py

@@ -1,4 +1,4 @@
-from __future__ import absolute_import, division, print_function, unicode_literals
+
 
 # Must happen before importing caffe2.python.*
 import caffe2.python.fakelowp.init_shared_libs  # noqa

caffe2/contrib/fakelowp/test/test_int8_ops_nnpi.py

@@ -1,4 +1,4 @@
-from __future__ import absolute_import, division, print_function, unicode_literals
+
 
 import caffe2.python.fakelowp.init_shared_libs  # noqa
 import numpy as np

caffe2/contrib/fakelowp/test/test_int8_quant.py

@@ -1,4 +1,4 @@
-from __future__ import absolute_import, division, print_function, unicode_literals
+
 
 # Must happen before importing caffe2.python.*
 import caffe2.python.fakelowp.init_shared_libs  # noqa

caffe2/contrib/fakelowp/test/test_layernorm_nnpi_fp16.py

@@ -1,7 +1,7 @@
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
+
+
+
+
 
 import numpy as np
 import caffe2.python.fakelowp.init_shared_libs  # noqa

caffe2/contrib/fakelowp/test/test_op_nnpi_fp16.py

@@ -1,7 +1,7 @@
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
+
+
+
+
 
 import numpy as np
 

caffe2/contrib/fakelowp/test/test_sls_4bit_nnpi_fp16.py

@@ -1,7 +1,7 @@
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
+
+
+
+
 
 import numpy as np
 import unittest

caffe2/contrib/fakelowp/test/test_sls_8bit_nnpi_fp16.py

@@ -1,4 +1,4 @@
-from __future__ import absolute_import, division, print_function, unicode_literals
+
 
 import unittest
 

caffe2/contrib/fakelowp/test/test_sls_8bit_nnpi_fp32.py

@@ -1,4 +1,4 @@
-from __future__ import absolute_import, division, print_function, unicode_literals
+
 
 import unittest
 

caffe2/contrib/gloo/gloo_test.py

@@ -1,9 +1,9 @@
 #!/usr/bin/env python
 
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
+
+
+
+
 
 from hypothesis import given, settings
 import hypothesis.strategies as st

caffe2/contrib/nccl/nccl_ops_test.py

@@ -1,7 +1,7 @@
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
+
+
+
+
 
 import unittest
 import hypothesis.strategies as st

caffe2/contrib/nnpack/nnpack_ops_test.py

@@ -1,7 +1,7 @@
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
+
+
+
+
 
 import unittest
 import hypothesis.strategies as st

caffe2/contrib/playground/AnyExp.py

@@ -1,7 +1,7 @@
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
+
+
+
+
 
 from abc import abstractmethod
 

caffe2/contrib/playground/AnyExpOnTerm.py

@@ -1,7 +1,7 @@
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
+
+
+
+
 
 import argparse
 import json

caffe2/contrib/playground/ModuleRegister.py

@@ -1,7 +1,7 @@
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
+
+
+
+
 
 import inspect
 import logging

caffe2/contrib/playground/checkpoint.py

@@ -1,7 +1,7 @@
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
+
+
+
+
 
 import numpy as np
 import pickle

caffe2/contrib/playground/compute_loss.py

@@ -1,7 +1,7 @@
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
+
+
+
+
 
 import caffe2.contrib.playground.meter as Meter
 from caffe2.python import workspace

caffe2/contrib/playground/compute_topk_accuracy.py

@@ -1,7 +1,7 @@
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
+
+
+
+
 
 import caffe2.contrib.playground.meter as Meter
 from caffe2.python import workspace

caffe2/contrib/playground/meter.py

@@ -1,7 +1,7 @@
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
+
+
+
+
 
 from abc import abstractmethod
 

caffe2/contrib/playground/module_map.py

@@ -1,7 +1,7 @@
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
+
+
+
+
 
 # Input
 import caffe2.contrib.playground.resnetdemo.\

caffe2/contrib/playground/output_generator.py

@@ -1,7 +1,7 @@
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
+
+
+
+
 
 from caffe2.python import timeout_guard
 

caffe2/contrib/playground/resnetdemo/IN1k_resnet.py

@@ -1,7 +1,7 @@
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
+
+
+
+
 
 import numpy as np
 

caffe2/contrib/playground/resnetdemo/IN1k_resnet_no_test_model.py

@@ -1,7 +1,7 @@
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
+
+
+
+
 
 import numpy as np
 

caffe2/contrib/playground/resnetdemo/caffe2_resnet50_default_forward.py

@@ -1,7 +1,7 @@
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
+
+
+
+
 
 import caffe2.python.models.resnet as resnet
 

caffe2/contrib/playground/resnetdemo/caffe2_resnet50_default_param_update.py

@@ -1,7 +1,7 @@
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
+
+
+
+
 
 
 def gen_param_update_builder_fun(self, model, dataset, is_train):

caffe2/contrib/playground/resnetdemo/explicit_resnet_forward.py

@@ -1,7 +1,7 @@
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
+
+
+
+
 
 import logging
 logging.basicConfig()

caffe2/contrib/playground/resnetdemo/explicit_resnet_param_update.py

@@ -1,7 +1,7 @@
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
+
+
+
+
 
 from caffe2.python import workspace, core
 from caffe2.proto import caffe2_pb2

caffe2/contrib/playground/resnetdemo/gfs_IN1k.py

@@ -1,7 +1,7 @@
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
+
+
+
+
 
 # # example1 using gfs as input source.
 

caffe2/contrib/playground/resnetdemo/override_no_test_model_no_checkpoint.py

@@ -1,7 +1,7 @@
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
+
+
+
+
 
 def checkpoint(self, epoch):
     self.model_path = None

caffe2/contrib/playground/resnetdemo/rendezvous_filestore.py

@@ -1,7 +1,7 @@
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
+
+
+
+
 
 from caffe2.python import core, workspace
 from caffe2.python import dyndep

caffe2/contrib/prof/cuda_profile_ops_test.py

@@ -1,7 +1,7 @@
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
+
+
+
+
 
 import unittest
 from caffe2.proto import caffe2_pb2

caffe2/contrib/tensorboard/tensorboard.py

@@ -1,7 +1,7 @@
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
+
+
+
+
 
 import click
 import collections