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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_behaviors(brain_or_object):
 """Iterate over all behaviors that are assigned to the object :param brain_or_object: A single catalog brain or content object :type brain_or_object: ATContentType/DexterityContentType/CatalogBrain :returns: Behaviors :rtype: list """

    obj = get_object(brain_or_object)
    if not is_dexterity_content(obj):
        fail(400, "Only Dexterity contents can have assigned behaviors")
    assignable = IBehaviorAssignable(obj, None)
    if not assignable:
        return {}
    out = {}
    for behavior in assignable.enumerateBehaviors():
        for name, field in getFields(behavior.interface).items():
            out[name] = field
    return out