DictQuery.py

class DictQuery(dict):
    '''
    source:
    https://www.haykranen.nl/2016/02/13/handling-complex-nested-dicts-in-python/?fbclid=IwAR1QG8j1zzjTraJKQsFqf6wrvW1hV622GtWSsEOlfWCwzEZI_NBmyp9IOmk
    Usage:
    >>> # Complex Dictionary
    >>> animals = [
            {
                "animal" : {
                    "type" : "bunny"
                }
            },
            {
                "animal" : {}
            },
            {}
        ]
    >>> # Getting nested "type" safely from "animal"
    >>> for item in animals:
            print DictQuery(item).get("animal/type")
    
    bunny
    {}
    None
    '''
    def get(self, path, default = None):
        keys = path.split("/")
        val = None

        for key in keys:
            if val:
                if isinstance(val, list):
                    val = [ v.get(key, default) if v else None for v in val]
                else:
                    val = val.get(key, default)
            else:
                val = dict.get(self, key, default)

            if not val:
                break;

        return val