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Project Description

Parsing mixin which converts data class instance, dict object, json string and yaml string each other.


Have you ever wanted to write robust code in Python? This library will make such your wishes come true.

Define your data class which is extend DictMixin, you can use some useful methods which help your codes robust. See following Example and API sections.


You don’t need to use typing necessarily, but I recommend to use this to make your codes more robust. See PEP 484 – Type Hints.

from typing import Text, Optional
from dictmixin import DictMixin

class Food(DictMixin):
    def __init__(self, id, name, color=None):
        self.id = id  # type: Text
        self.name = name  # type: Text
        self.color = color  # type: Optional[Text]

class Human(DictMixin):
    def __init__(self, id, name, favorite):
        self.id = id  # type: Text
        self.name = name  # type: Text
        self.favorite = Food.from_dict2list(favorite)  # type: Food

jiro = Human.from_dict({
    "id": 10,
    "name": "jiro",
    "favorite": [
        {"id": 1, "name": "apple"},
        {"id": 2, "name": "orange", "color": "white"}

>>> jiro.id
>>> jiro.name
>>> print(jiro.favorite[0].to_pretty_json())
    "color": null,
    "id": 1,
    "name": "apple"
>>> print(jiro.to_dict())
{'favorite': [{'color': None, 'id': 1, 'name': 'apple'}, {'color': 'white', 'id': 2, 'name': 'orange'}], 'id': 10, 'name': 'jiro'}


From instance to another

  • to_dict
    • instance => dict
  • to_json
    • instance => json string
  • to_pretty_json
    • instance => json string (has indent and line break)
  • to_yaml
    • instance => yaml string

From something to instance

  • from_dict
    • dict => instance [1]
  • from_dict2list
    • dict => List[instance] [1]
  • from_dict2dict
    • dict => Dict[instance] [1]
  • from_json
    • json string => instance
  • from_yaml
    • yaml string => instance
[1](1, 2, 3) Also includes optional methods. (from_optional_xxx)


pip install dictmixin
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