sidereal.py: Internal maintenance specification

This script exercises the MixedUnits class by using it to convert various mixed values in the days-hours-minutes-seconds system, convert them back, and format them with and without left zero fill.

#!/usr/bin/env python
#================================================================
# testmix: Exercise the MixedUnits class.
#   For documentation, see:
#     http://www.nmt.edu/tcc/help/lang/python/examples/sidereal/ims/
#----------------------------------------------------------------

from sidereal import *

dhmsSystem = MixedUnits ( (24, 60, 60) )

testValues = [
    (),
    (3.9,),
    (2,12),
    (1,4,10),
    (0,1,30,15),
    (1, 2, 3, 4, 5),   # Not valid
    (1, 0, 0, 59.999999),
    (1, 0, 0, 59.9),
    (1, 2, 3, 59.5),
    (1, 0, 0, 59.499999) ]
              
def test(seq):
    """Test one tuple.
    """
    #--
    # Convert the sequence to a single value.  This can fail
    # if the sequence is too long.
    #--
    try:              
        single = dhmsSystem.mixToSingle(seq)
    except ValueError, detail:
        print "Bad value:", detail
        return

    #--
    # Convert it back to a sequence, and show all three values.
    # Then format it in a range of precisions, with/without zeroes.
    #--
    check = dhmsSystem.singleToMix(single)
    print "%s -> %s -> %s" % (seq, single, check)
    for  digits in range(4):
        noZeroes = dhmsSystem.format ( check, digits )
        withZeroes = dhmsSystem.format ( check, digits, lz=True )
        print "    %d %s %s" % (digits, noZeroes, withZeroes)

#================================================================
# Main
#----------------------------------------------------------------

for  valueList in testValues:
    test(valueList)