Series.
astype
Cast a Koalas object to a specified dtype dtype.
dtype
Use a numpy.dtype or Python type to cast entire pandas object to the same type.
See also
to_datetime
Convert argument to datetime.
Examples
>>> ser = ks.Series([1, 2], dtype='int32') >>> ser 0 1 1 2 Name: 0, dtype: int32
>>> ser.astype('int64') 0 1 1 2 Name: 0, dtype: int64