def dict_of_sets_add ( dictionary , key , value ) : # type: (DictUpperBound, Any, Any) -> None set_objs = dictionary . get ( key , set ( ) ) set_objs . add ( value ) dictionary [ key ] = set_objs
how to add an item to a set in python
Add value to a set in a dictionary by key
def dict_of_sets_add(dictionary, key, value):
    # type: (DictUpperBound, Any, Any) -> None
    """Add value to a set in a dictionary by key

    Args:
        dictionary (DictUpperBound): Dictionary to which to add values
        key (Any): Key within dictionary
        value (Any): Value to add to set in dictionary

    Returns:
        None

    """
    set_objs = dictionary.get(key, set())
    set_objs.add(value)
    dictionary[key] = set_objs