dict

nested_dict_delete(root, key, sep='.')

Iterate through a dict, deleting items recursively based on a key.

Parameters:

Name	Type	Description	Default
root	dict	dictionary to remove an entry from	required
key	str	the string used to locate the key to delete in the root dictionary	required
sep	str	the separator for dictionary key items	'.'

Returns:

Name	Type	Description
dict		the modified dict_to

Examples:

>>> d1 = {'test': {'test_val': 3}}
>>> d2 = {'test': {'test_val': 5, 'test_val_2': 7}, 'other': 3}
>>> nested_dict_delete(d1, 'test.test_val')
>>> d1
{}
>>> nested_dict_delete(d2, 'test.test_val')
>>> d2
{'test': {'test_val_2': 7}, 'other': 3}

Source code in chmpy/util/dict.py

def nested_dict_delete(root, key, sep="."):
    """
    Iterate through a dict, deleting items
    recursively based on a key.

    Args:
        root (dict): dictionary to remove an entry from
        key (str): the string used to locate the key to delete in the root dictionary
        sep (str): the separator for dictionary key items

    Returns:
        dict: the modified dict_to

    Examples:
        >>> d1 = {'test': {'test_val': 3}}
        >>> d2 = {'test': {'test_val': 5, 'test_val_2': 7}, 'other': 3}
        >>> nested_dict_delete(d1, 'test.test_val')
        >>> d1
        {}
        >>> nested_dict_delete(d2, 'test.test_val')
        >>> d2
        {'test': {'test_val_2': 7}, 'other': 3}
    """

    levels = key.split(sep)
    level_key = levels[0]
    if level_key in root:
        if isinstance(root[level_key], MutableMapping):
            nested_dict_delete(root[level_key], sep.join(levels[1:]), sep=sep)
            if not root[level_key]:
                del root[level_key]
        else:
            del root[level_key]
    else:
        raise KeyError

recursive_dict_update(dict_to, dict_from)

Iterate through a dictionary , updating items inplace recursively from a second dictionary.

Parameters:

Name	Type	Description	Default
dict_to	dict	the first dictionary (to update)	required
dict_from	dict	the second dictionary (to pull updates from)	required

Returns:

Name	Type	Description
dict		the modified dict_to

Examples:

>>> d1 = {'test': {'test_val': 3}}
>>> d2 = {'test': {'test_val': 5}, 'other': 3}
>>> recursive_dict_update(d1, d2)
{'test': {'test_val': 5}, 'other': 3}

Source code in chmpy/util/dict.py

def recursive_dict_update(dict_to, dict_from):
    """
    Iterate through a dictionary , updating items inplace
    recursively from a second dictionary.

    Args:
        dict_to (dict): the first dictionary (to update)
        dict_from (dict): the second dictionary (to pull updates from)

    Returns:
        dict: the modified dict_to

    Examples:
        >>> d1 = {'test': {'test_val': 3}}
        >>> d2 = {'test': {'test_val': 5}, 'other': 3}
        >>> recursive_dict_update(d1, d2)
        {'test': {'test_val': 5}, 'other': 3}
    """
    for key, val in dict_from.items():
        if isinstance(val, Mapping):
            dict_to[key] = recursive_dict_update(dict_to.get(key, {}), val)
        else:
            dict_to[key] = val
    return dict_to