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Revision 1476

Added by Aaron Marcuse-Kubitza almost 13 years ago

units.py: convert(): raise MissingUnitsException if quantity doesn't have units. MissingUnitsException: Take Quantity input instead of str.

View differences:

lib/units.py
8 8 
import util
9 9 

  		




  10
  10
  
    
class MissingUnitsException(Exception):


  		




  11
  
  
    
    def __init__(self, value):


  		




  12
  
  
    
        Exception.__init__(self, 'Value has no units: '+value)


  		




  
  11
  
    
    def __init__(self, quantity):


  		




  
  12
  
    
        Exception.__init__(self, 'Quantity has no units: '+quantity)


  		




  13
  13
  
    

  		




  14
  14
  
    
def std_units(units):


  		




  15
  15
  
    
    if units == None: return units


  		




  ......




  43
  43
  
    
def convert(quantity, units):


  		




  44
  44
  
    
    units = std_units(units)


  		




  45
  45
  
    
    if units == None: return Quantity(quantity.value, units) # remove units


  		




  46
  
  
    
    elif quantity.units == units: return quantity


  		




  
  46
  
    
    elif quantity.units == units: return quantity # units already correct


  		




  
  47
  
    
    elif quantity.units == None: raise MissingUnitsException(quantity)


  		




  
  48
  
    
        # can't convert quantity with unknown units


  		




  47
  49
  
    
    else: raise NotImplementedError('Unit conversion not implemented yet')


  		












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