astype(self, dtype, **kwargs)
Typecode or data-type to which the array is cast.
Controls what kind of data casting may occur. Defaults to 'unsafe' for backwards compatibility.
'no' means the data types should not be cast at all.
'equiv' means only byte-order changes are allowed.
'safe' means only casts which can preserve values are allowed.
'same_kind' means only safe casts or casts within a kind,
like float64 to float32, are allowed.
'unsafe' means any data conversions may be done.
By default, astype always returns a newly allocated array. If this is set to False and the :None:None:`dtype` requirement is satisfied, the input array is returned instead of a copy.
Copy of the array, cast to a specified type.
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