def makeDistancesList(list):
    """Returns a list of distances between adjacent numbers in some input list.

    E.g. [1, 1, 2, 3, 5, 7] -> [0, 1, 1, 2, 2]
    """

    d = []
    for i in range(len(list[:-1])):
        d.append(list[i+1] - list[i])

    return d