[Numpy-discussion] Adding generic dtypes

[Charles R Harris]

Hi All,

The possibility of disabling default creation of object arrays has come up
again. I'm wondering if one way to get there is to allow generic dtypes.
The `numpy/core/numerictypes.py` module defines a hierarchy, and if we
could allow things like `dtype=integer` or `dtype=no_object` and such we
would gain more control over the resulting array types. At some point we
could make `no_object` the default if we so desired.

Thoughts?

Chuck
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