Back out "deeplearning/projects/flashlight-sequence" (#20)

Summary:
Pull Request resolved: #20

Breaks Python packaging: #19

Original commit changeset: 65996e1616d0

Original Phabricator Diff: D53935505

Reviewed By: bwasti

Differential Revision: D55274807

fbshipit-source-id: 4229a9a61df64b23bd44fd348ac7fab97109876a

Author: jacobkahn

bindings/python/flashlight/lib/sequence/criterion.py

@@ -6,13 +6,33 @@
 LICENSE file in the root directory of this source tree.
 """
 
+from .flashlight_lib_sequence_criterion import (
+    CpuForceAlignmentCriterion,
+    CpuFullConnectionCriterion,
+    CpuViterbiPath,
+    CriterionScaleMode,
+)
+
 
 have_torch = False
 try:
+    import torch
 
     have_torch = True
 except ImportError:
     pass
 
 if have_torch:
-    pass
+    from flashlight.lib.sequence.criterion_torch import (
+        ASGLoss,
+        check_tensor,
+        create_workspace,
+        FACFunction,
+        FCCFunction,
+        get_cuda_stream_as_bytes,
+        get_data_ptr_as_bytes,
+        run_backward,
+        run_direction,
+        run_forward,
+        run_get_workspace_size,
+    )

bindings/python/test/test_import.py

@@ -11,6 +11,13 @@
 
 class ImportTestCase(unittest.TestCase):
     def test_import_lib_sequence(self) -> None:
+        from flashlight.lib.sequence import criterion
+        from flashlight.lib.sequence.criterion import (
+            CpuForceAlignmentCriterion,
+            CpuFullConnectionCriterion,
+            CpuViterbiPath,
+            CriterionScaleMode,
+        )
 
         if os.getenv("USE_CUDA", "OFF").upper() not in [
             "OFF",
@@ -19,7 +26,11 @@ def test_import_lib_sequence(self) -> None:
             "FALSE",
             "N",
         ]:
-            pass
+            from flashlight.lib.sequence.flashlight_lib_sequence_criterion import (
+                CudaForceAlignmentCriterion,
+                CudaFullConnectionCriterion,
+                CudaViterbiPath,
+            )
         else:
             logging.info("Flashlight Sequence bindings built without CUDA")