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# numpy.dtype.subdtype

`dtype.``subdtype`

  Tuple `(item_dtype, shape)` if this `dtype` describes a sub-array, and None otherwise.

  The shape is the fixed shape of the sub-array described by this data type, and item_dtype the data type of the array.

  If a field whose dtype object has this attribute is retrieved, then the extra dimensions implied by shape are tacked on to the end of the retrieved array.