cf.DimensionCoordinate.period

DimensionCoordinate.period(*value)

Set the period for cyclic coordinates.

Parameters:

value : data-like or None, optional

The period. The absolute value is used.

Returns:

out : cf.Data or None

The period prior to the change, or the current period if no value was specified. In either case, None is returned if the period had not been set previously.

Examples:

>>> print c.period()
None
>>> c.Units
<CF Units: degrees_east>
>>> print c.period(360)
None
>>> c.period()
<CF Data: 360.0 'degrees_east'>
>>> import math
>>> c.period(cf.Data(2*math.pi, 'radians'))
<CF Data: 360.0 degrees_east>
>>> c.period()
<CF Data: 6.28318530718 radians>
>>> c.period(None)
<CF Data: 6.28318530718 radians>
>>> print c.period()
None
>>> print c.period(-360)
None
>>> c.period()
<CF Data: 360.0 degrees_east>