TimeFromEpoch

class astropy.time.TimeFromEpoch(val1, val2, scale, precision, in_subfmt, out_subfmt, from_jd=False)[source]

Bases: astropy.time.TimeNumeric

Base class for times that represent the interval from a particular epoch as a floating point multiple of a unit time interval (e.g. seconds or days).

Attributes Summary

cache Return the cache associated with this instance.
jd1
jd2
jd2_filled
mask
masked
scale Time scale
subfmts
value

Methods Summary

mask_if_needed(self, value)
set_jds(self, val1, val2) Initialize the internal jd1 and jd2 attributes given val1 and val2.
to_value(self[, parent]) Return time representation from internal jd1 and jd2.

Attributes Documentation

cache

Return the cache associated with this instance.

jd1
jd2
jd2_filled
mask
masked
scale

Time scale

subfmts = (('float', <class 'numpy.float64'>, None, <ufunc 'add'>), ('long', <class 'numpy.float128'>, <function longdouble_to_twoval>, <function twoval_to_longdouble>), ('decimal', <class 'numpy.object_'>, <numpy.vectorize object>, <numpy.vectorize object>), ('str', <class 'numpy.str_'>, <numpy.vectorize object>, <numpy.vectorize object>), ('bytes', <class 'numpy.bytes_'>, <numpy.vectorize object>, <numpy.vectorize object>))
value

Methods Documentation

mask_if_needed(self, value)
set_jds(self, val1, val2)[source]

Initialize the internal jd1 and jd2 attributes given val1 and val2. For an TimeFromEpoch subclass like TimeUnix these will be floats giving the effective seconds since an epoch time (e.g. 1970-01-01 00:00:00).

to_value(self, parent=None, **kwargs)[source]

Return time representation from internal jd1 and jd2. Subclasses that require parent or to adjust the jds should override this method.