Determine if any object is a sequence.

is_sequence.py

#=============================================================================
def is_sequence( subject ):
    """
    Determines if any object/variable/whatever is a sequence.
    """

    # assume the subject is not a sequence
    result = False

    # attempt to extract the iterable representation
    try:
        iterator = iter( subject )

    # the subject can not be iterated
    except TypeError:
        result = False

    # the subject can be iterated
    else:

        # for this test, we don't count strings as sequences
        if isinstance( subject, basestring ) == True:
            result = False

        # safe to assume the subject is a sequence
        else:
            result = True

    # return the result of the test
    return result