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题目
给定list=[2,9,6,45,13],使她升序排列
解答
答案一
list = [2,9,6,45,13]
list.sort()
print list
答案二
list = [2,9,6,45,13]
a = sorted(list)
print a
思考
第一想法是冒泡排序,一个一个进行比较。
这恰恰不符合python简单优雅的宗旨,
还没从面向过程转移到面向对象的思路上转移过来;
在python中,我们不必要重复造轮子,函数方法,以及第三方库一定要好好的利用
sort()与sorted()方法的区别:
方法一中 list的值已经被改变
方法二中 list的升序的值被赋值给a ,list 本身并没有改变
拓展
如果降序排列呢?
给sorted()的方法加参数 reverse –(反面;背面;倒退;相反的情况(或事物))
reverse = True or reverse = 1 降序
reverse =False or reverse = 0 升序
sorted(a,reverse =1)
一个简单的函数,记住了就会用,没见过就压根想不到,所以要多积累