The following works just fine for me on Python 2.7
import numpy
from decimal import Decimal
x = [Decimal('646'), Decimal('651'), Decimal('657')]
tempArray = numpy.array(x, dtype=numpy.dtype(Decimal))
print numpy.mean(tempArray)
Вопрос
I have a little problem. In my program, in Python 3.3, I made a list of decimal values (x):
[Decimal('646'), Decimal('651'), Decimal('657')]
And I want to know the mean value using Numpy.
So I wrote:
tempArray = numpy.array(x, dtype=np.dtype(decimal.Decimal))
But I got the error:
TypeError: unsupported operand type(s) for /: 'decimal.Decimal' and 'float'
What is wrong with my code?
Решение
The following works just fine for me on Python 2.7
import numpy
from decimal import Decimal
x = [Decimal('646'), Decimal('651'), Decimal('657')]
tempArray = numpy.array(x, dtype=numpy.dtype(Decimal))
print numpy.mean(tempArray)
Другие советы
Why do you need to use Numpy? This can be done easily with
>>> sum(x)/len(x)
Decimal('651.3333333333333333333333333')
That said, I was able to do
>>> np.array(x).mean()
Decimal('651.3333333333333333333333333')