torch.set_default_dtype¶

torch.set_default_dtype(d)[source]¶

Sets the default floating point dtype to d. This dtype is:

1. The inferred dtype for python floats in torch.tensor().

2. Used to infer dtype for python complex numbers. The default complex dtype is set to torch.complex128 if default floating point dtype is torch.float64, otherwise it’s set to torch.complex64

The default floating point dtype is initially torch.float32.

Parameters

d (torch.dtype) – the floating point dtype to make the default

Example

>>> # initial default for floating point is torch.float32
>>> torch.tensor([1.2, 3]).dtype
torch.float32
>>> # initial default for floating point is torch.complex64
>>> torch.tensor([1.2, 3j]).dtype
torch.complex64
>>> torch.set_default_dtype(torch.float64)
>>> torch.tensor([1.2, 3]).dtype    # a new floating point tensor
torch.float64
>>> torch.tensor([1.2, 3j]).dtype   # a new complex tensor
torch.complex128