Re: [Numpy-discussion] A simple question about type().

[Paulo J. S. S. <rs...@im...>]

This is a more tricky question.

If I understand well enough. The name "array" in a python section
relates to a factory function that builds arraytype objects. It is not
the name for the array type. For example, if you type:

type(array)

you get

<type 'builtin_function_or_method'>

Which shows that it is a function, not a class object.

There are more subtlety associated to the fact that Numeric does not use
the new class styles as numarray does. Actually if you use numarray
instead of Numeric you'll get a more sensible behavior

>>> import numarray
>>> a =3D numarray.array([1.,2.,3.])
>>> type(a)
<class 'numarray.numarraycore.NumArray'>
>>> type(a) is numarray.NumArray
True
>>> isinstance(a, numarray.NumArray)
True
>>>

Best regards,

Paulo

Obs: You may consider using a "try: except:" statement instead of always
checking type. In Python is usually better to ask "forgiveness" in a
"except" clause than to ask "permission" by checking types.

--=20
Paulo Jos=E9 da Silva e Silva=20
Professor Assistente do Dep. de Ci=EAncia da Computa=E7=E3o
(Assistant Professor of the Computer Science Dept.)
Universidade de S=E3o Paulo - Brazil

e-mail: rs...@im...          Web: http://www.ime.usp.br/~rsilva

Teoria =E9 o que n=E3o entendemos o    (Theory is something we don't)
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                                   (practice)