mindspore.dataset.transforms.c_transforms.Mask

class mindspore.dataset.transforms.c_transforms.Mask(operator, constant, dtype=mstype.bool_)[source]

Mask content of the input tensor with the given predicate. Any element of the tensor that matches the predicate will be evaluated to True, otherwise False.

Parameters

  • operator (Relational) – relational operators, it can be any of [Relational.EQ, Relational.NE, Relational.LT, Relational.GT, Relational.LE, Relational.GE], take Relational.EQ as example, EQ refers to equal.

  • constant (Union[str, int, float, bool]) – Constant to be compared to.

  • dtype (mindspore.dtype, optional) – Type of the generated mask. Default: mindspore.dtype.bool_.

Raises

  • TypeError – operator is not of type Relational.

  • TypeError – constant is not of type string int, float or bool.

  • TypeError – dtype is not of type mindspore.dtype.

Supported Platforms:

CPU

Examples

>>> from mindspore.dataset.transforms.c_transforms import Relational
>>> # Data before
>>> # |  col   |
>>> # +---------+
>>> # | [1,2,3] |
>>> # +---------+
>>> data = [[1, 2, 3]]
>>> numpy_slices_dataset = ds.NumpySlicesDataset(data, ["col"])
>>> numpy_slices_dataset = numpy_slices_dataset.map(operations=c_transforms.Mask(Relational.EQ, 2))
>>> # Data after
>>> # |       col         |
>>> # +--------------------+
>>> # | [False,True,False] |
>>> # +--------------------+