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Rewrite of descriptor section #43

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Rewrite of descriptor section #43

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12e6726
Redid descriptor prose and example. (Docs not regenerated)
brandjon Dec 16, 2013
ef3cdfe
Regenerated docs.
brandjon Dec 16, 2013
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24 changes: 8 additions & 16 deletions listings/descriptor.py
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Original file line number Diff line number Diff line change
@@ -1,24 +1,16 @@
class Meter(object):
'''Descriptor for a meter.'''
class Feet(object):
'''Descriptor for foot-based access of a meter value.'''

def __init__(self, value=0.0):
self.value = float(value)
def __get__(self, instance, owner):
return self.value
return instance.meters * 3.2808
def __set__(self, instance, value):
self.value = float(value)

class Foot(object):
'''Descriptor for a foot.'''

def __get__(self, instance, owner):
return instance.meter * 3.2808
def __set__(self, instance, value):
instance.meter = float(value) / 3.2808
instance.meters = float(value) / 3.2808

class Distance(object):
'''Class to represent distance holding two descriptors for feet and
meters.'''
meter = Meter()
foot = Foot()

def __init__(self, meters):
self.meters = meters
feet = Feet()

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