def insert_into_every(dods, key, value):
    """Insert key:values into every subdictionary of dods.

    Args:
        dods: dictionary of dictionaries
        key: key to hold values in subdictionaires
        value: value to associate with key

    Returns:
        dict: dictionary of dictionaries with key:values inserted into each
    """

    def update(d, v):
        d.update({key: v})
        return d

    return {k: update(v, value) for k, v in dods.items()}