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POClass special method behavior __complex__
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copied!<p>I have a class that defines the <code>__complex__</code> special method. My class is not a standard numeric type (int, float, etc.), but it behaves like one as I have special methods defined for <code>__add__</code>, <code>__sub__</code>, etc.</p> <p>I would like <code>__complex__</code> to return my complex valued numeric object, not a standard complex numeric value python expects. As such, Python throws the following error when I try to return my object, rather than a standard complex numeric.</p> <blockquote> <p>TypeError: unsupported operand type(s) for *: 'complex' and 'MyNumericClass'</p> </blockquote> <p>What's the best way to do this?</p> <hr> <p>Edit:</p> <pre><code># Python builtins import copy # Numeric python import numpy as np class MyNumericClass (object): """ My numeric class, with one single attribute """ def __init__(self, value): self._value = value def __complex__(self): """ Return complex value """ # This looks silly, but my actual class has many attributes other # than this one value. self._value = complex(self._value) return self def zeros(shape): """ Create an array of zeros of my numeric class Keyword arguments: shape -- Shape of desired array """ try: iter(shape) except TypeError, te: shape = [shape] zero = MyNumericClass(0.) return fill(shape, zero) def fill(shape, value): """ Fill an array of specified type with a constant value Keyword arguments: shape -- Shape of desired array value -- Object to initialize the array with """ try: iter(shape) except TypeError, te: shape = [shape] result = value for i in reversed(shape): result = [copy.deepcopy(result) for j in range(i)] return np.array(result) if __name__ == '__main__': a_cplx = np.zeros(3).astype(complex) print a_cplx b_cplx = zeros(3).astype(complex) print b_cplx </code></pre>

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