gcsUnitConversion.py

import math

def dd2dms(dd):
  if dd < 0:
    degrees = math.ceil(dd)
  else:
   degrees = math.floor(dd)

  minutes = 60 * (dd%1)
  seconds = 60 * (minutes%1)

  return {'degrees':degrees,'minutes':math.floor(minutes),'seconds':seconds}
     
def dms2dd(degrees,minutes,seconds):
  secDeci = '{}'.format((seconds/60)/100)
  minDeci = '{}'.format(minutes/60)
  dd = degrees + float(minDeci) + float(secDeci)
  return {'decimal degrees': dd}