On Tue, 2003-05-06 at 08:24, Peter Verveer wrote:
I found the following problems after testing my software with numarray 0.5:
- Following works fine if both a and b are arrays:
a = array() b = array([1, 2]) print a + b
However, if b is an python sequence:
a = array() b = [1, 2] print a + b
Apparently broadcasting does not work with python sequeces anymore. This used to work fine in version 0.4. Is this a bug?
Yes, unfortunately. Thanks for reporting it!
- It is not possible to compare an array type object to the 'Any' object:
Float64 == Any
Traceback (most recent call last): File "<stdin>", line 1, in ? File "/usr/local/lib/python2.2/site-packages/numarray/numerictypes.py", line 112, in __cmp__ return (genericTypeRank.index(self.name) - ValueError: list.index(x): x not in list
I am not sure if this is a bug, or intended behaviour, but the possibilty to compare an array type object to 'Any' would be very useful for me.
'Any' grew up from the C-API, rather than down from the Python design, so it's not very well thought out. Right now, it is a placeholder used to mark arrays with undefined types and to indicate "no type constraint" in C API calls. In normal contexts, you can't make an array of type 'Any'. I think there are two reasonable behaviors for comparisons with 'Any', both used in C. The first behavior is literal comparison; here comparison to Any would generally return "not equal". The second behavior is wild-card matching; here, comparison to Any would generally return "equal". Which makes sense to you? How do you want to use this?
- The NA_typeNoToTypeObject() function fails if it is called before any
arrays are created. It looks to me as if the pNumType array in libnumarraymodule.c is not initialized until an array is created. I don't know if any other functions are affected in the same way. Could this be fixed?
Yes. This is fixed now in CVS. Thanks again!
-- Dr. Peter J. Verveer Cell Biology and Cell Biophysics Programme EMBL Meyerhofstrasse 1 D-69117 Heidelberg Germany Tel. : +49 6221 387245 Fax : +49 6221 387242 Email: Peter.Verveer@embl-heidelberg.de
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