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<p>嗨,我被上面的错误困住了。
最后一个函数“get_student_average”出现问题。
如果“results”存储“get_average(student)”值,为什么它不能返回“get_letter_grade(results)”的结果??</p>
<pre><code>lloyd = {
"name": "Lloyd",
"homework": [90.0, 97.0, 75.0, 92.0],
"quizzes": [88.0, 40.0, 94.0],
"tests": [75.0, 90.0]
}
alice = {
"name": "Alice",
"homework": [100.0, 97.0, 98.0, 100.0],
"quizzes": [98.0, 99.0, 99.0],
"tests": [100.0, 100.0]
}
tyler = {
"name": "Tyler",
"homework": [0.0, 35.0, 45.0, 22.0],
"quizzes": [0.0, 60.0, 58.0],
"tests": [65.0, 58.0]
}
students = [lloyd,alice,tyler]
def average(numbers):
total= sum(numbers)
total = float(total)
return total / len(numbers)
def get_average(student):
homework= average(student["homework"])
quizzes= average(student["quizzes"])
tests= average(student["tests"])
return 0.1 * homework + 0.3 * quizzes + 0.6 * tests
def get_letter_grade(score):
if score >= 90:
return "A"
elif score >= 80:
return "B"
elif score >= 70:
return "C"
elif score >= 60:
return "D"
else:
return "F"
def get_student_average(gruppo):
for student in gruppo:
results= []
results.<a href="https://www.cnpython.com/list/append" class="inner-link">append</a>(get_average(student))
print (student["name"])
print (results)
print (get_letter_grade(results))
get_student_average(students)
</code></pre>