Python3 代码

n = input().split()

w = [0.2, 0.3, 0.4, 0.1]
avg = 0
for i in range (0, len(n)):
   avg += eval(n[i]) * w[i]

print ("Media:", f'{avg:.1f}')

if avg > 7.0:
    print ("Aluno aprovado.")
elif avg < 5.0:
    print ("Aluno reprovado.")
else:
    print ("Aluno em exame.")
    y = float(input())
    print ("Nota do exame:", y)
    z = (avg + y)/2
    if z >= 5.0:
        print ("Aluno aprovado.")
    else:
        print ("Aluno reprovado.")
    print ("Media final:", f'{z:.1f}')