Hello, I was using append_fields() in numpy.lib.recfunctions when I discovered a slight logic mistake in handling the dtypes argument.
The code first checks to see if dtypes is None. If so, it then guesses the dtype info from the input data. Then, it goes to see if the dtypes is not a sequence and puts it into a list. This is where the logic breaks down. It then proceeds to use that dtypes to start merging the data. However, if you pass in a sequence of dtype, that condition gets skipped and the rest of the function has to figure out the dtype (and ignores the supplied names as well). I have attached a patch to fix this. I did not check the rest of the module to see if this mis-logic crops up anywhere else. Thanks, Ben Root
recfuncs.patch
Description: Binary data
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