def isdistinct(coll):
most_common = collections.Counter(coll).most_common(<NUM_LIT:1>)<EOL>return not most_common[<NUM_LIT:0>][<NUM_LIT:1>] > <NUM_LIT:1><EOL>
Return True if all the items in the collections are distinct.

    :param coll: a collection
    :returns: a boolean

    >>> isdistinct([1, 2, 3])
    True
    >>> isdistinct([1, 2, 2])
    False