Instantiate object variables from a string

Question

For example in pseudocode:

class Example:

    def __init__(self, dict):
        for key, value in dict.items():
            self.key = value

a = Example({"objectVariable": ["some", "data"]})
print(a.objectVariable)
>>>["some", "data"]

How would I implement this?

Thanks in advance

my apologies, i thought the functionality i sought to accomplish would be best expressed in an example. I edited the question to clarify what I'm looking for — Primusa, Dec 31 '17 at 01:05

score 1 · Accepted Answer · answered Dec 31 '17 at 00:58

1

Assign dict to the built in __dict__ for greater simplicy:

class Example:
   def __init__(self, dict):
     self.__dict__ = dict

answered Dec 31 '17 at 00:58

Ajax1234

69,937
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`self.__dict__.update(dict)` should be preferred as it is more generally applicable. Also, later changes to the passed `dict` will not be reflected in the instance attributes! – user2390182 Dec 31 '17 at 01:37
1

A note not to shadow the built-in name `dict` would also be nice. – user2390182 Dec 31 '17 at 01:44

score 1 · Answer 2 · answered Dec 31 '17 at 00:59

1

You're looking for __getattr__, which will be called if the slot doesn't exist.

class Example:
    def __init__(self, dict):
        self.dict = dict
    def __getattr__(self, prop):
        return self.dict[prop]

answered Dec 31 '17 at 00:59

Silvio Mayolo

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Instantiate object variables from a string

2 Answers2