torch.finfo函数

torch.finfo
torch.finfo是一个对象，它表示浮点torch.dtype的数字属性。这类似于
numpy.finfo，torch.float32，torch.float64，torch.float16.

A torch.finfo provides the following attributes:

	#号后为返回值
    max_neg_value0 = torch.finfo(torch.float16).tiny #6.103515625e-05
    max_neg_value1 = torch.finfo(torch.float16).max  #65504.0
    max_neg_value2 = torch.finfo(torch.float32).max  #3.4028234663852886e+38
    max_neg_value3 = torch.finfo(torch.float64).max  #1.7976931348623157e+308