python - 如何从列表 "Python": 打印字典

Question

lloyd = {
    "name": "Lloyd",
    "homework": [90.0, 97.0, 75.0, 92.0],
    "quizzes": [88.0, 40.0, 94.0],
    "tests": [75.0, 90.0]
}

students = ["lloyd","alice","tyler"]


#Accessing Dictionary from List

print students[0]['name']

预计是:Lloyd

每当我运行上面的代码时，我都会得到这个错误，

===============================================
Traceback (most recent call last):
  File "python", line 30, in <module>
TypeError: string indices must be integers 
===============================================

我们将不胜感激任何帮助。

Answer 1

这是因为学生只包含字符串 ["lloyd","alice","tyler"]

print students[0]
>> "lloyd"

也许你想这样做:

students = [lloyd]

然后

print students[0]['name']

应该可以