observations = {
    "eye_color": "brown",       # nominal - categories, no order
    "satisfaction": "good",     # ordinal - categories, has order
    "num_pets": 2,               # discrete - countable whole number
    "height_cm": 172.5            # continuous - any value in a range
}

data_types = {
    "eye_color": "categorical (nominal)",
    "satisfaction": "categorical (ordinal)",
    "num_pets": "numerical (discrete)",
    "height_cm": "numerical (continuous)"
}

for key, value in observations.items():
    print(f"{key} = {value} -> {data_types[key]}")