'Make a random array of shape (len(dates), len(sids)) with ``dtype``.'

def values(self, dtype, dates, sids):

    shape = (len(dates), len(sids))
    return {datetime64ns_dtype: self._datetime_values, float64_dtype: self._float_values, int64_dtype: self._int_values, bool_dtype: self._bool_values, object_dtype: self._object_values}[dtype](shape)
