attribute
dtype.
names
Ordered list of field names, or None if there are no fields.
None
The names are ordered according to increasing byte offset. This can be used, for example, to walk through all of the named fields in offset order.
Examples
>>> dt = np.dtype([('name', np.str_, 16), ('grades', np.float64, (2,))]) >>> dt.names ('name', 'grades')