replace_dict_recursive.py

def replace_dict(obj, cbv, key=lambda x: True, value=lambda x: True):
    """

    Replaces dict values recursively.

    >>> cats = {
            "name": "Telefon",
            "desc": "Telefon modelleri",
            "id": 1,
            "is_active": "True",
            "155": "Polis İmdat",
            "child":{
                     "name": "Telefon - Akıllı Telefon",
                     "desc": "Akıllı telefon modelleri",
                     "id": 2,
                     "is_active": "True",
                     "112": "Hızır Acil",
                     "child": {
                               "name": "Telefon - Akıllı Telefon - Android",
                               "desc": "Android akıllı telefon modelleri",
                               "id": 3,
                               "is_active": "False",
                               "110": "İtfaiye",
                     }
            }
    }

    # replace all key's value with empty string
    >>> replace_dict(cats, '')
    {'155': '', 'child': '', 'desc': '', 'id': '', 'is_active': '', 'name': ''}

    # replace all key's value with empty string if value is not dict
    >>> replace_dict(cats, '', value=lambda x: not isinstance(x, dict))
    {'155': '', 'name': '', 'is_active': '', 'child': {'name': '', '112': '', 'is_active': '', 'child': {'id': '', ...


    # replace all key's value with empty string if key stars with integer
    >>> import re
    >>> replace_dict(cats, '', key=lambda x: re.search('^\d', x))
    {'155': '', 'name': u'Telefon', 'is_active': 'True', 'child': {'name': u'Telefon - Akıllı Telefon', '112': '', ...

    # convert values string to boolean if the key stars with 'is_' keyword and value contains 'True' or 'False'
    >>> import re
    >>> replace_dict(cats,
                     lambda x: True if x == 'True' else False,
                     key=lambda x: re.search('^is_', x),
                     value=lambda x: re.search('^(False|True)$', x)
                    )
    {'155': 'Polis İmdat', 'name': 'Telefon', 'is_active': True, 'child': {'name': 'Telefon - Akıllı Telefon', '112': ...

    # remove parent category's name from category name which are separated by dash symbol
    >>> import re
    >>> replace_dict(cats,
                    lambda x: x.split(' - ', 1)[1:][0],
                    key= lambda x: re.search('name', x),
                    value= lambda x: re.search('-', x))
    {'155': 'Polis İmdat', 'name': 'Telefon', 'is_active': 'True', 'child': {'name': 'Akıllı Telefon', '112': 'Hızır Acil', ...
    """
    for k, v in obj.items():
        if key(k) and value(v):
            obj[k] = cbv(v) if hasattr(cbv, '__call__') else cbv
        if isinstance(v, dict):
            replace_dict(v, cbv, key=key, value=value)