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, 92.0, 98.0, 100.0],
"quizzes": [82.0, 83.0, 91.0],
"tests": [89.0, 97.0]
}
tyler = {
"name": "Tyler",
"homework": [0.0, 87.0, 75.0, 22.0],
"quizzes": [0.0, 75.0, 78.0],
"tests": [100.0, 100.0]
}
# Add your function below!
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"])
print student["name"]
return .1*homework+.3*quizzes+.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"
results=[]
def get_class_average(students):
results.append(get_average(students))
return average(results)
qq=[lloyd,alice,tyler]
for x in qq:
get_class_average(x)
s= get_average(x)
print s, get_letter_grade(s)
print
print results , "Total class average is %s" % average(results)
#
上述方案虽然给予正确的结果是给我下面的错误: get_class_average([爱丽丝])导致错误:列表索引必须是整数,不str的列表索引必须是整数不str的蟒蛇错误
输出如下:
Lloyd
Lloyd
80.55 B
Alice
Alice
91.15 A
Tyler
Tyler
79.9 C
[80.55, 91.14999999999999, 79.9] Total class average is 83.8666666667
None
我跑上面的代码,但它工作。没有得到'列表索引必须是整数,而不是str'异常。 – 2015-03-02 15:28:38
如果出现错误,您如何获得输出?请提供完整的追溯。 – Matthias 2015-03-02 15:30:12
什么打印该错误? Python通常不会将错误报告为“xxx导致错误...” – interjay 2015-03-02 15:31:34