def return_dispense_media():
    """Returns a dict of media for reagent dispenser.

    Example Usage:

    .. code-block:: python

        from autoprotocol.protocol import Protocol
        from autoprotocol-utilities import return_dispense_media

        p = Protocol()
        media = return_dispense_media()["50_ug/ml_Kanamycin"]
        plate = p.ref("myplate", cont_type="96-flat", discard=True)
        p.dispense_full_plate(plate, media, "200:microliter")

    Autoprotocol Output:
    -------

    .. code-block:: python

        {
            "refs": {
                "myplate": {
                    "new": "96-flat",
                    "discard": True
                }
            },
            "instructions": [
                {
                    "reagent": "lb_miller_50ug_ml_kan",
                    "object": "myplate",
                    "columns": [
                        {
                            "column": 0,
                            "volume": "200:microliter"
                        },
                        {
                            "column": 1,
                            "volume": "200:microliter"
                        },
                        {
                            "column": 2,
                            "volume": "200:microliter"
                        },
                        {
                            "column": 3,
                            "volume": "200:microliter"
                        },
                        {
                            "column": 4,
                            "volume": "200:microliter"
                        },
                        {
                            "column": 5,
                            "volume": "200:microliter"
                        },
                        {
                            "column": 6,
                            "volume": "200:microliter"
                        },
                        {
                            "column": 7,
                            "volume": "200:microliter"
                        },
                        {
                            "column": 8,
                            "volume": "200:microliter"
                        },
                        {
                            "column": 9,
                            "volume": "200:microliter"
                        },
                        {
                            "column": 10,
                            "volume": "200:microliter"
                        },
                        {
                            "column": 11,
                            "volume": "200:microliter"
                        }
                    ],
                    "op": "dispense"
                }
            ]
        }

    Returns
    -------
    dict
        Media with common `display_name` as key and identifier for code
        as value


    """
    media = {'50_ug/ml_Kanamycin': 'lb_miller_50ug_ml_kan',
        '100_ug/ml_Ampicillin': 'lb_miller_100ug_ml_amp',
        '100_ug/mL_Spectinomycin': 'lb_miller_100ug_ml_specto',
        '30_ug/ml_Kanamycin': 'lb_miller_30ug_ml_kan',
        '15_ug/ml_Tetracycline': 'lb_miller_15ug_ml_tet',
        '50_ug/ml_Kanamycin_25_ug/ml_Chloramphenicol':
        'lb_miller_50ug_ml_kan_25ug_ml_cm', '25_ug/ml_Chloramphenicol':
        'lb_miller_25ug_ml_cm', 'LB_miller': 'lb_miller_noAB',
        'TB_100_ug/ml_Ampicillin': 'tb_100ug_ml_amp',
        'TB_50_ug/ml_Kanamycin': 'tb_50ug_ml_kan'}
    return media
