[Numpy-discussion] Classes as records within an numpy array
sturla at molden.no
Sun Apr 10 22:17:04 EDT 2011
Den 11.04.2011 03:59, skrev David Crisp:
> Is it a significant problem if I use the x[i][j] method and not the
> x[i,j] method? Or are we talking about trying to stick with a
It is a significant problem.
Consider that x[i][j] means ( x[i] )[j]. Then consider that x[i] in your
case returns an instance of Record, not ndarray.
If you want 2D indexing on an ndarray, it should be written as x[i,j]. A
2D NumPY array is not an array of arrays.
If you work with nested Python lists, you should index x[i][j], because
x[i] will return a list.
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