time.py 文件源码

def __init__(self,
                 data=(datetime.now(),),
                 filename=None,
                 varname=None,
                 tz_offset=None,
                 origin=None,
                 displacement=timedelta(seconds=0),
                 **kwargs):
        '''
        Representation of a time axis. Provides interpolation alphas and indexing.

        :param time: Ascending list of times to use
        :param tz_offset: offset to compensate for time zone shifts
        :param origin: shifts the time interval to begin at the time specified
        :param displacement: displacement to apply to the time data. Allows shifting entire time interval into future or past
        :type time: netCDF4.Variable or [] of datetime.datetime
        :type tz_offset: datetime.timedelta
        :type origin: datetime.timedelta
        :type displacement: datetime.timedelta
        '''

        if isinstance(data, (nc4.Variable, nc4._netCDF4._Variable)):
            self.data = nc4.num2date(data[:], units=data.units)
        elif data is None:
            self.data = np.array([datetime.now()])
        else:
            self.data = np.asarray(data)

        if origin is not None:
            diff = self.data[0] - origin
            self.data -= diff

        self.data += displacement

        self.filename = filename
        self.varname = varname

#         if self.filename is None:
#             self.filename = self.id + '_time.txt'

        if tz_offset is not None:
            self.data += tz_offset

        if not self._timeseries_is_ascending(self.data):
            raise ValueError("Time sequence is not ascending")
        if self._has_duplicates(self.data):
            raise ValueError("Time sequence has duplicate entries")

        self.name = data.name if hasattr(data, 'name') else None