NumPy参考 >例行程序 >Datetime Support Functions > numpy.datetime_data
numpy.
datetime_data
(dtype, /)¶Get information about the step size of a date or time type.
The returned tuple can be passed as the second argument of numpy.datetime64
and
numpy.timedelta64
.
The dtype object, which must be a datetime64
or timedelta64
type.
The datetime unit on which this dtype is based.
The number of base units in a step.
Examples
>>> dt_25s = np.dtype('timedelta64[25s]')
>>> np.datetime_data(dt_25s)
('s', 25)
>>> np.array(10, dt_25s).astype('timedelta64[s]')
array(250, dtype='timedelta64[s]')
The result can be used to construct a datetime that uses the same units as a timedelta
>>> np.datetime64('2010', np.datetime_data(dt_25s))
numpy.datetime64('2010-01-01T00:00:00','25s')