def minimums(some_dict):
    """ Returns a list of all keys with the minimum value within a dictionary

    :param some_dict: dictionary with values as ints
    :return: list with all keys that had the minimum value
    """

    positions = {}
    min_value = float("inf")
    for k, v in some_dict.items():
        if v == min_value:
            positions[k] = v
        if v < min_value:
            min_value = v
            positions.clear()
            positions[k] = v

    return positions