Fix import

src/brevitas/__init__.py

@@ -23,6 +23,12 @@
 else:
     torch_version = version.parse(torch.__version__)
 
+try:
+    # Attempt _dynamo import
+    is_dynamo_compiling = torch._dynamo.is_compiling
+except:
+    is_dynamo_compiling = lambda: False
+
 try:
     __version__ = get_distribution(__name__).version
 except DistributionNotFound:

src/brevitas/nn/mixin/base.py

@@ -16,6 +16,7 @@
 from torch.nn.utils.rnn import PackedSequence
 
 from brevitas import config
+from brevitas import is_dynamo_compiling
 from brevitas import torch_version
 from brevitas.common import ExportMixin
 from brevitas.inject import ExtendedInjector
@@ -29,11 +30,6 @@
 
 from .utils import filter_kwargs
 
-if torch_version < packaging.version.parse('2.0'):
-    is_dynamo_compiling = lambda: False
-else:
-    is_dynamo_compiling = torch._dynamo.is_compiling
-
 
 class QuantProxyMixin(object):
     __metaclass__ = ABCMeta

src/brevitas/proxy/parameter_quant.py

@@ -7,23 +7,15 @@
 from typing import Any, List, Optional, Tuple, Union
 from warnings import warn
 
-import packaging.version
 import torch
-
-from brevitas import torch_version
-from brevitas.core.function_wrapper.misc import Identity
-
-if torch_version < packaging.version.parse('2.0'):
-    is_dynamo_compiling = lambda: False
-else:
-    is_dynamo_compiling = torch._dynamo.is_compiling
-
 from torch import Tensor
 import torch.nn as nn
 from typing_extensions import Protocol
 from typing_extensions import runtime_checkable
 
 from brevitas import config
+from brevitas import is_dynamo_compiling
+from brevitas.core.function_wrapper.misc import Identity
 from brevitas.function import max_int
 from brevitas.inject import BaseInjector as Injector
 from brevitas.quant_tensor import _unpack_quant_tensor

src/brevitas/proxy/runtime_quant.py

@@ -5,22 +5,15 @@
 from abc import abstractmethod
 from typing import Any, Optional, Tuple, Union
 
-import packaging.version
 import torch
-
-from brevitas import torch_version
-
-if torch_version < packaging.version.parse('2.0'):
-    is_dynamo_compiling = lambda: False
-else:
-    is_dynamo_compiling = torch._dynamo.is_compiling
 from torch import nn
 from torch import Tensor
 from torch.nn import Identity
 from typing_extensions import Protocol
 from typing_extensions import runtime_checkable
 
 import brevitas
+from brevitas import is_dynamo_compiling
 from brevitas.quant_tensor import IntQuantTensor
 from brevitas.quant_tensor import QuantTensor
 from brevitas.utils.quant_utils import _CachedIO