def METHOD_NAME():
    """
    A dictionary describing the version of Sage.
    INPUT:
    nothing
    OUTPUT:
    dictionary with keys 'major', 'minor', 'tiny', 'prerelease'
    This process the Sage version string and produces a dictionary.
    It expects the Sage version to be in one of these forms::
       N.N
       N.N.N
       N.N.N.N
       N.N.str
       N.N.N.str
       N.N.N.N.str
    where 'N' stands for an integer and 'str' stands for a string.
    The first integer is stored under the 'major' key and the second
    integer under 'minor'.  If there is one more integer, it is stored
    under 'tiny'; if there are two more integers, then they are stored
    together as a float N.N under 'tiny'.  If there is a string, then
    the key 'prerelease' returns True.
    For example, if the Sage version is '3.2.1', then the dictionary
    is {'major': 3, 'minor': 2, 'tiny': 1, 'prerelease': False}.
    If the Sage version is '3.2.1.2', then the dictionary is
    {'major': 3, 'minor': 2, 'tiny': 1.200..., 'prerelease': False}.
    If the Sage version is '3.2.alpha0', then the dictionary is
    {'major': 3, 'minor': 2, 'tiny': 0, 'prerelease': True}.
    EXAMPLES::
        sage: from sage.misc.banner import version_dict
        sage: print("SageMath major version is %s" % version_dict()['major'])
        SageMath major version is ...
        sage: version_dict()['major'] == int(sage.version.version.split('.')[0])
        True
    """
    v = SAGE_VERSION.split('.')
    dict = {}
    dict['major'] = int(v[0])
    dict['minor'] = int(v[1])
    dict['tiny'] = 0
    dict['prerelease'] = False
    try:
        int(v[-1])
    except ValueError:  # when last entry is not an integer
        dict['prerelease'] = True
    if (len(v) == 3 and not dict['prerelease']) or len(v) > 3:
        dict['tiny'] = int(v[2])
    try:
        teeny = int(v[3])
        dict['tiny'] += 0.1 * teeny
    except (ValueError, IndexError):
        pass
    return dict