a OSic@sHddlZddlZddlmZddgZGdddeZGdddeZdS)N)Anydetect_anomalyset_detect_anomalyc@s<eZdZdZddddZddddZeddd d ZdS) ran Context-manager that enable anomaly detection for the autograd engine. This does two things: - Running the forward pass with detection enabled will allow the backward pass to print the traceback of the forward operation that created the failing backward function. - Any backward computation that generate "nan" value will raise an error. .. warning:: This mode should be enabled only for debugging as the different tests will slow down your program execution. Example: >>> import torch >>> from torch import autograd >>> class MyFunc(autograd.Function): ... @staticmethod ... def forward(ctx, inp): ... return inp.clone() ... @staticmethod ... def backward(ctx, gO): ... # Error during the backward pass ... raise RuntimeError("Some error in backward") ... return gO.clone() >>> def run_fn(a): ... out = MyFunc.apply(a) ... return out.sum() >>> inp = torch.rand(10, 10, requires_grad=True) >>> out = run_fn(inp) >>> out.backward() Traceback (most recent call last): File "", line 1, in File "/your/pytorch/install/torch/_tensor.py", line 93, in backward torch.autograd.backward(self, gradient, retain_graph, create_graph) File "/your/pytorch/install/torch/autograd/__init__.py", line 90, in backward allow_unreachable=True) # allow_unreachable flag File "/your/pytorch/install/torch/autograd/function.py", line 76, in apply return self._forward_cls.backward(self, *args) File "", line 8, in backward RuntimeError: Some error in backward >>> with autograd.detect_anomaly(): ... inp = torch.rand(10, 10, requires_grad=True) ... out = run_fn(inp) ... out.backward() Traceback of forward call that caused the error: File "tmp.py", line 53, in out = run_fn(inp) File "tmp.py", line 44, in run_fn out = MyFunc.apply(a) Traceback (most recent call last): File "", line 4, in File "/your/pytorch/install/torch/_tensor.py", line 93, in backward torch.autograd.backward(self, gradient, retain_graph, create_graph) File "/your/pytorch/install/torch/autograd/__init__.py", line 90, in backward allow_unreachable=True) # allow_unreachable flag File "/your/pytorch/install/torch/autograd/function.py", line 76, in apply return self._forward_cls.backward(self, *args) File "", line 8, in backward RuntimeError: Some error in backward NreturncCst|_tjddddS)NzqAnomaly Detection has been enabled. This mode will increase the runtime and should only be enabled for debugging.) stacklevel)torchis_anomaly_enabledprevwarningswarnselfrW/var/www/html/django/DPS/env/lib/python3.9/site-packages/torch/autograd/anomaly_mode.py__init__Is zdetect_anomaly.__init__cCstddS)NT)r set_anomaly_enabledrrrr __enter__Oszdetect_anomaly.__enter__argsrcGst|jdSNr rr rrrrr__exit__Rszdetect_anomaly.__exit__)__name__ __module__ __qualname____doc__rrrrrrrrrs@c@s>eZdZdZeddddZddddZedd d d ZdS) raContext-manager that sets the anomaly detection for the autograd engine on or off. ``set_detect_anomaly`` will enable or disable the autograd anomaly detection based on its argument :attr:`mode`. It can be used as a context-manager or as a function. See ``detect_anomaly`` above for details of the anomaly detection behaviour. Args: mode (bool): Flag whether to enable anomaly detection (``True``), or disable (``False``). N)modercCst|_t|dSr)r r r r)rrrrrres zset_detect_anomaly.__init__rcCsdSrrrrrrriszset_detect_anomaly.__enter__rcGst|jdSrrrrrrrlszset_detect_anomaly.__exit__) rrrrboolrrrrrrrrrVs)r r typingr__all__objectrrrrrrs  N