Re: [Numpy-discussion] Fix for ticket #1973

Bruce Southey Mon, 16 Jan 2012 07:39:07 -0800

On 01/14/2012 04:31 PM, Charles R Harris wrote:

I've put up a pull request for a fix to ticket #1973. Currently thefix simply propagates the maskna flag when the *.astype method iscalled. A more complicated option would be to add a maskna keyword tospecify whether the output is masked or not or propagates the type ofthe source, but that seems overly complex to me.
Thoughts?

Chuck


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Thanks for the correction and as well as the fix. While it worked forinteger and floats (not complex ones), I got an error when using complexdtypes. This error that is also present in array creation of complexdtypes. Is this known or a new bug?

If it is new, then we need to identify what functionality should handlenp.NA but are not working.


Bruce

$ python
Python 2.7 (r27:82500, Sep 16 2010, 18:02:00)
[GCC 4.5.1 20100907 (Red Hat 4.5.1-3)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import numpy as np
>>> np.__version__ # pull request version
'2.0.0.dev-88f9276'
>>> np.array([1,2], dtype=np.complex)
array([ 1.+0.j,  2.+0.j])
>>> np.array([1,2, np.NA], dtype=np.complex)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>

File "/usr/lib64/python2.7/site-packages/numpy/core/numeric.py", line1445, in array_repr

    ', ', "array(")

File "/usr/lib64/python2.7/site-packages/numpy/core/arrayprint.py",line 459, in array2string

    separator, prefix, formatter=formatter)

File "/usr/lib64/python2.7/site-packages/numpy/core/arrayprint.py",line 263, in _array2string

    suppress_small),

File "/usr/lib64/python2.7/site-packages/numpy/core/arrayprint.py",line 724, in __init__

    self.real_format = FloatFormat(x.real, precision, suppress_small)

ValueError: Cannot construct a view of data together with theNPY_ARRAY_MASKNA flag, the NA mask must be added later

>>> ca=np.array([1,2], dtype=np.complex, maskna=True)
>>> ca[1]=np.NA
>>> ca
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>