我有一个定义__complex__
特殊方法的类。我的类不是标准数字类型(int、float 等),但它的行为类似于我为 、 等定义的特殊__add__
方法__sub__
。
我想__complex__
返回我的复数值对象,而不是 python 期望的标准复数值。因此,当我尝试返回我的对象而不是标准复数时,Python 会引发以下错误。
TypeError: *: 'complex' 和 'MyNumericClass' 的不支持的操作数类型
最好的方法是什么?
编辑:
# 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