I have several properties on a class that have very similar behavior.
If one of the properties is set, all the other properties need to be
set to None. So I wanted to create these properties in a loop like:
class Test(object):
for prop in ['foo', 'bar', 'spam']:
# Attribute that data is actually stored in
field = '_' + prop
# Create getter/setter
def _get(self):
return getattr(self, field)
def _set(self, val):
setattr(self, field, val)
for otherProp in prop:
if otherProp != prop: setattr(self, '_' +
otherProp, None)
# Assign property to class
setattr(Test, prop, property(_get, _set))
t = Test()
t.foo = 1
assert t.bar == t.spam == None
But the class Test is not defined yet, so I can't set a property on
it. How can I do this?
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