Source code for mars.tensor.reduction.any

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Copyright 1999-2021 Alibaba Group Holding Ltd.
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
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# distributed under the License is distributed on an "AS IS" BASIS,
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import numpy as np

from ... import opcodes as OperandDef
from ..datasource import tensor as astensor
from .core import TensorReduction, TensorReductionMixin

class TensorAny(TensorReduction, TensorReductionMixin):
    _op_type_ = OperandDef.ANY
    _func_name = "any"

    def __init__(self, axis=None, keepdims=None, combine_size=None, stage=None, **kw):
        stage = self._rewrite_stage(stage)

[docs]def any(a, axis=None, out=None, keepdims=None, combine_size=None): """ Test whether any tensor element along a given axis evaluates to True. Returns single boolean unless `axis` is not ``None`` Parameters ---------- a : array_like Input tensor or object that can be converted to an array. axis : None or int or tuple of ints, optional Axis or axes along which a logical OR reduction is performed. The default (`axis` = `None`) is to perform a logical OR over all the dimensions of the input array. `axis` may be negative, in which case it counts from the last to the first axis. If this is a tuple of ints, a reduction is performed on multiple axes, instead of a single axis or all the axes as before. out : Tensor, optional Alternate output tensor in which to place the result. It must have the same shape as the expected output and its type is preserved (e.g., if it is of type float, then it will remain so, returning 1.0 for True and 0.0 for False, regardless of the type of `a`). See `doc.ufuncs` (Section "Output arguments") for details. keepdims : bool, optional If this is set to True, the axes which are reduced are left in the result as dimensions with size one. With this option, the result will broadcast correctly against the input tensor. If the default value is passed, then `keepdims` will not be passed through to the `any` method of sub-classes of `Tensor`, however any non-default value will be. If the sub-classes `sum` method does not implement `keepdims` any exceptions will be raised. combine_size: int, optional The number of chunks to combine. Returns ------- any : bool or Tensor A new boolean or `Tensor` is returned unless `out` is specified, in which case a reference to `out` is returned. See Also -------- Tensor.any : equivalent method all : Test whether all elements along a given axis evaluate to True. Notes ----- Not a Number (NaN), positive infinity and negative infinity evaluate to `True` because these are not equal to zero. Examples -------- >>> import mars.tensor as mt >>> mt.any([[True, False], [True, True]]).execute() True >>> mt.any([[True, False], [False, False]], axis=0).execute() array([ True, False]) >>> mt.any([-1, 0, 5]).execute() True >>> mt.any(mt.nan).execute() True """ a = astensor(a) if a.dtype == object: dtype = a.dtype else: dtype = np.dtype(bool) op = TensorAny(axis=axis, dtype=dtype, keepdims=keepdims, combine_size=combine_size) return op(a, out=out)