Python之列表嵌套

列表的嵌套

lst = ['shell','python','go','java',True,False,[1,2,3,['qiaoning','wangtao','lixianglong'],8]]
print(lst)
#['shell', 'python', 'go', 'java', True, False, [1, 2, 3, ['qiaoning', 'wangtao', 'lixianglong'], 8]]
lst[-1][3][2] = lst[-1][3][2].upper()
print(lst)
#['shell', 'python', 'go', 'java', True, False, [1, 2, 3, ['qiaoning', 'wangtao', 'LIXIANGLONG'], 8]]

次数 count

 ls = [1,11,1,2,3,11,22,33,100,999,56,88,99]
 ls1 = ls.count(1)
 print(ls1) #2

排序 sort

 ls = [1,11,1,2,3,11,22,33,100,999,56,88,99]
 ls.sort()
 print(ls) #[1, 1, 2, 3, 11, 11, 22, 33, 56, 88, 99, 100, 999]

逆序排序 reverse=True

ls = [1,11,1,2,3,11,22,33,100,999,56,88,99]
 ls.sort(reverse=True)
 print(ls) #[999, 100, 99, 88, 56, 33, 22, 11, 11, 3, 2, 1, 1]

翻转 reverse

 ls = [1,11,1,2,3,11,22,33,100,999,56,88,99
 ls.reverse()
 print(ls) #[99, 88, 56, 999, 100, 33, 22, 11, 3, 2, 1, 11, 1]

长度 len

print(len(ls)) #13