Source code for xorbits._mars.tensor.arithmetic.real
# Copyright 2022-2023 XProbe Inc.
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#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
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#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
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import numpy as np
from ... import opcodes as OperandDef
from ..utils import infer_dtype
from .core import TensorUnaryOp
from .utils import arithmetic_operand
@arithmetic_operand(sparse_mode="unary")
class TensorReal(TensorUnaryOp):
_op_type_ = OperandDef.REAL
_func_name = "real"
[docs]@infer_dtype(np.real)
def real(val, **kwargs):
"""
Return the real part of the complex argument.
Parameters
----------
val : array_like
Input tensor.
Returns
-------
out : Tensor or scalar
The real component of the complex argument. If `val` is real, the type
of `val` is used for the output. If `val` has complex elements, the
returned type is float.
See Also
--------
real_if_close, imag, angle
Examples
--------
>>> import mars.tensor as mt
>>> a = mt.array([1+2j, 3+4j, 5+6j])
>>> a.real.execute()
array([ 1., 3., 5.])
>>> a.real = 9
>>> a.execute()
array([ 9.+2.j, 9.+4.j, 9.+6.j])
>>> a.real = mt.array([9, 8, 7])
>>> a.execute()
array([ 9.+2.j, 8.+4.j, 7.+6.j])
>>> mt.real(1 + 1j).execute()
1.0
"""
op = TensorReal(**kwargs)
return op(val)