On May 12, 9:11 am, JamesEM <james.hous...@deutsche-boerse.com> wrote:
> Hello,
> I have a python class that contains a dictionary.
> I would like to use python properties to access the elements of the
> dictionary.
> This could be achieved as follows:
>
> class MyClass(object):
>
> def __init__(self):
> self.d = {}
> d['field1'] = 1.0
> d['field2'] = 'A'
> d['field3'] = [10.0,20.0,30.0]
>
> @property
> def field1(self):
> return self.d['field1']
>
> @field1.setter
> def field1(self, value):
> self.d['field1'] = value
>
> @field1.deleter
> def field1(self):
> del self.d['field1']
>
> @property
> def field2(self):
> return self.d['field2']
>
> @field1.setter
> def field2(self, value):
> self.d['field2'] = value
>
> @field1.deleter
> def field2(self):
> del self.d['field2']
>
> @property
> def field3(self):
> return self.d['field3']
>
> @field3.setter
> def field3(self, value):
> self.d['field3'] = value
>
> @field3.deleter
> def field3(self):
> del self.d['field3']
>
> However, I am effectively writing the same properties code three
> times.
> I would prefer to generate the properties code dynamically from the
> keys of the dictionaries.
> What I am looking for is something like:
>
> class MyClass(object):
>
> def __init__(self):
> self.d = {}
> d['field1'] = 1.0
> d['field2'] = 'A'
> d['field3'] = [10.0,20.0,30.0]
> for f in d:
> create_property(f)
>
> where create_property(f) dynamically creates the property code for
> field f in MyClass.
>
> Is this possible?
> If so, how could I do it?
>
> Thanks,
> James
Some searching in the cookbook should help. I found this:
http://code.activestate.com/recipes/577590-dictionary-whos-keys-act-like-attributes-as-well/
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