python - 类型错误：不可排序的类型：str() float()

在编程的世界里，我们经常会遇到各种各样的错误。其中，类型错误是最常见的一种错误之一。在使用Python进行编程时，我们有时会遇到一个类型错误，错误信息显示为："不可排序的类型：str() > float()"。这个错误的意思是，我们试图将一个字符串类型的变量与一个浮点数类型的变量进行比较，但是Python无法对这两种类型进行排序。

python
students = [
    {"name": "Alice", "score": 85},
    {"name": "Bob", "score": 92},
    {"name": "Charlie", "score": 78},
    {"name": "David", "score": 90}
]
sorted_students = sorted(students, key=lambda x: x["score"], reverse=True)
print(sorted_students)

python
students = [
    {"name": "Alice", "score": 85},
    {"name": "Bob", "score": 92},
    {"name": "Charlie", "score": 78},
    {"name": "David", "score": 90}
]
def get_score(student):
    return student["score"]
sorted_students = sorted(students, key=get_score, reverse=True)
print(sorted_students)

python
students = [
    {"name": "Alice", "score": 85},
    {"name": "Bob", "score": 92},
    {"name": "Charlie", "score": 78},
    {"name": "David", "score": 90}
]
sorted_students = sorted(students, key=lambda x: float(x["score"]), reverse=True)
print(sorted_students)