排序：

1：整理顺序

#冒泡lista = [5,7,11,19,99,63,3,9,1]list = []while lista != []:    number = 0    for i in lista:        if number < i:            number = i    lista.remove(number)    list.append(number)print(list)

打印结果：D:\untitled\1\venv\Scripts\python.exe D:/untitled/1/venv/main.py[99, 63, 19, 11, 9, 7, 5, 3, 1]Process finished with exit code 0

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#选择lista = [5,7,11,19,99,63,3,9,1]list = []while lista != []:    for i in lista:        number = 1        for j in lista:            if number < j:                number = j    lista.remove(number)    list.append(number)print(list)

打印结果：D:\untitled\1\venv\Scripts\python.exe D:/untitled/1/venv/main.py[99, 63, 19, 11, 9, 7, 5, 3, 1]Process finished with exit code 0

2：sort()函数

#sort函数lista =[5,7,11,19,99,63,3,9,1]lista.sort()print(lista)

打印结果： D:\untitled\1\venv\Scripts\python.exe D:/untitled/1/venv/main.py[1, 3, 5, 7, 9, 11, 19, 63, 99]Process finished with exit code 0

3：加上一个数

#若a=18,在原来的list中按顺序加上这个个数list = [1,4,7,9,11,14,19,34,60,79,98]print("前：%s" %list)a = 18list.append(a)list_1 = []while list != []:    number = 100    for i in list:        if i < number:            number = i    list.remove(number)    list_1.append(number)print("后：%s" %list_1)

打印结果：D:\untitled\1\venv\Scripts\python.exe D:/untitled/1/venv/main.py前：[1, 4, 7, 9, 11, 14, 19, 34, 60, 79, 98]后：[1, 4, 7, 9, 11, 14, 18, 19, 34, 60, 79, 98]Process finished with exit code 0

实例：

3*3表

#3*3表listx = [1,2,3,]for i in listx:    for j in listx:        if i >= j:            x = i*j            print("%s*%s=%s"  %(i,j,x) ,end=" ")    print()

打印结果：D:\untitled\1\venv\Scripts\python.exe D:/untitled/1/venv/main.py1*1=1 2*1=2 2*2=4 3*1=3 3*2=6 3*3=9 Process finished with exit code 0

列表反向打印：list_num = ["1","2","3"]打印顺序：3,2,1

使用len（）函数

#反向列表(len() 方法返回对象（字符、列表、元组等）长度或项目个数)list_num = ["1","2","3"]i = len(list_num)print(list_num[i-1::-1])

打印结果： D:\untitled\1\venv\Scripts\python.exe D:/untitled/1/venv/main.py['3', '2', '1']Process finished with exit code 0

使用reverse()函数

list_num = ["1","2","3"]list_num.reverse()print(list_num)

打印结果：D:\untitled\1\venv\Scripts\python.exe D:/untitled/1/venv/main.py['3', '2', '1']Process finished with exit code 0

使用for语句

a = [1,2,3,4,5,6]num = len(a)for i in range(int(num/2)):    a[i],a[num -i -1 ] = a[num-i-1],a[i]print(a)

D:\untitled\1\venv\Scripts\python.exe D:/untitled/1/venv/main.py[6, 5, 4, 3, 2, 1]Process finished with exit code 0

小知识：

list_num = ["1","2","3"]for i in list_num[::-1]:#从后往前取值    print(i)

打印结果：D:\untitled\1\venv\Scripts\python.exe D:/untitled/1/venv/main.py321Process finished with exit code 0