python.context-manager
==========================
null_context_manager
^^^^^^^^^^^^^^^^^^^^

.. note::

    Tags: :doc:`python.context-manager <python.context-manager>`

    Support Level: SUPPORTED

Original source code:

.. code-block:: python

    import contextlib
    
    import torch
    
    
    
    def null_context_manager(x):
        """
        Null context manager in Python will be traced out.
        """
        ctx = contextlib.nullcontext()
        with ctx:
            return x.sin() + x.cos()
    

Result:

.. code-block::

    ExportedProgram:
        class GraphModule(torch.nn.Module):
            def forward(self, l_x_: "f32[3, 2]"):
                    sin: "f32[3, 2]" = torch.ops.aten.sin.default(l_x_)
                cos: "f32[3, 2]" = torch.ops.aten.cos.default(l_x_);  l_x_ = None
                add: "f32[3, 2]" = torch.ops.aten.add.Tensor(sin, cos);  sin = cos = None
                return (add,)
                
    Graph signature: ExportGraphSignature(input_specs=[InputSpec(kind=<InputKind.USER_INPUT: 1>, arg=TensorArgument(name='l_x_'), target=None)], output_specs=[OutputSpec(kind=<OutputKind.USER_OUTPUT: 1>, arg=TensorArgument(name='add'), target=None)])
    Range constraints: {}
    Equality constraints: []