Python: How to remove all empty fields in a nested dict

Question

If I have a dict, which field\'s values may also be a dict or an array. How can I remove all empty fields in it?

\"Empty field\" means a field\'s value is empty arra

Answer 1

def remove_empty_fields(data_):
    """
        Recursively remove all empty fields from a nested
        dict structure. Note, a non-empty field could turn
        into an empty one after its children deleted.

        :param data_: A dict or list.
        :return: Data after cleaning.
    """
    if isinstance(data_, dict):
        for key, value in data_.items():

            # Dive into a deeper level.
            if isinstance(value, dict) or isinstance(value, list):
                value = remove_empty_fields(value)

            # Delete the field if it's empty.
            if value in ["", None, [], {}]:
                del data_[key]

    elif isinstance(data_, list):
        for index in reversed(range(len(data_))):
            value = data_[index]

            # Dive into a deeper level.
            if isinstance(value, dict) or isinstance(value, list):
                value = remove_empty_fields(value)

            # Delete the field if it's empty.
            if value in ["", None, [], {}]:
                data_.pop(index)

    return data_