python3学习笔记--两种排序方法
列表排序方法
sort()：仅对list对象进行排序，会改变list自身的顺序，没有返回值，即原地排序
sorted()：对所有可迭代对象进行排序，返回排序后的新对象，原对象保持不变；
sort()
list.sort(key=None, reverse=False)
key：设置排序方法，或指定list中用于排序的元素；
reverse：升降序排列，默认为升序排列；
例子：
nums = [2, 3, 5, 1, 6]
nums.sort()
print(nums) # [1, 2, 3, 5, 6]
nums.sort(key=None, reverse=True)
print(nums) # [6, 5, 3, 2, 1]
students = [('john', 'C', 15), ('jane', 'A', 12), ('dave', 'B', 10)]
students.sort(key=lambda x: ...
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