notas={
    "Andres":[5.0, 4.0, 3.0, 5.0],
    "Miguel":[5.0, 4.0, 4.0, 5.0],
    "Esteban":[5.0, 5.0, 5.0, 5.0],
    "Dylan":[4.0, 4.0, 4.0, 5.0],
    "Laura":[4.0, 4.0, 5.0, 5.0],
}

notas["Manuel"]=notas["Dylan"]
del notas["Dylan"]
notas["Manuel"][0]=5.0
notas["Karen"]=[5.0, 3.0, 4.5, 5.0]
del notas["Andres"]
print(notas)

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