1 1.創建列表 2 >>> names = ['old_driver', 'rain', 'jack', 'shanshan', 'peiqi', 'black_girl'] 3 >>> names 4 ['old_driver', 'rain', 'jack', 'shanshan', 'peiqi', 'black_girl'] 5 6 2.插入alex 7 >>> names.insert(-1,'alex') 8 >>> names 9 ['old_driver', 'rain', 'jack', 'shanshan', 'peiqi', 'alex', 'black_girl'] 10 11 3.shanshan改成中文 12 >>> names 13 ['old_driver', 'rain', 'jack', 'shanshan', 'peiqi', 'alex', 'black_girl'] 14 >>> names.index('shanshan') 15 3 16 >>> names[names.index('shanshan')] = "珊珊" 17 >>> names 18 ['old_driver', 'rain', 'jack', '珊珊', 'peiqi', 'alex', 'black_girl'] 19 20 4.rain后面插一個子列表 21 >>> names.insert(2,['oldboy','oldgirl']) 22 >>> names 23 ['old_driver', 'rain', ['oldboy', 'oldgirl'], 'jack', '珊珊', 'peiqi', 'alex', 'black_girl'] 24 25 5.得到peiqi得索引值 26 >>> names.index('peiqi') 27 5 28 29 6.創建新列表并合入names列表中 30 >>> s = [1,2,3,4,2,5,6,2] 31 >>> s 32 [1, 2, 3, 4, 2, 5, 6, 2] 33 >>> names.extend(s) 34 >>> names 35 ['old_driver', 'rain', ['oldboy', 'oldgirl'], 'jack', '珊珊', 'peiqi', 'alex', 'black_girl', 1, 2, 3, 4, 2, 5, 6, 2] 36 37 7.取出names列表4-7得元素 38 >>> names 39 ['old_driver', 'rain', ['oldboy', 'oldgirl'], 'jack', '珊珊', 'peiqi', 'alex', 'black_girl', 1, 2, 3, 4, 2, 5, 6, 2] 40 >>> names[4:7] 41 ['珊珊', 'peiqi', 'alex'] 42 43 8.取出name列表2-10得元素步長為2 44 >>> names[2:10:2] 45 [['oldboy', 'oldgirl'], '珊珊', 'alex', 1] 46 47 9.取出列表最后3個元素 48 >>> names[-3:] 49 [5, 6, 2] 50 51 10.循環列表 打印每個元素得索引值和元素 52 >>> for i in names: 53 print(names.index(i), i) 54 55 56 0 old_driver 57 1 rain 58 2 ['oldboy', 'oldgirl'] 59 3 jack 60 4 珊珊 61 5 peiqi 62 6 alex 63 7 black_girl 64 8 1 65 9 2 66 10 3 67 11 4 68 9 2 69 13 5 70 14 6 71 9 2 72 >>> 73 74 >>> count = 0 75 >>> for i in names: 76 print(count,i) 77 count += 1 78 79 80 0 old_driver 81 1 rain 82 2 ['oldboy', 'oldgirl'] 83 3 jack 84 4 珊珊 85 5 peiqi 86 6 alex 87 7 black_girl 88 8 1 89 9 2 90 10 3 91 11 4 92 12 2 93 13 5 94 14 6 95 15 2 96 >>> 97 98 >>> for i in enumerate(names): 99 print(i) 100 101 102 (0, 'old_driver') 103 (1, 'rain') 104 (2, ['oldboy', 'oldgirl']) 105 (3, 'jack') 106 (4, '珊珊') 107 (5, 'peiqi') 108 (6, 'alex') 109 (7, 'black_girl') 110 (8, 1) 111 (9, 2) 112 (10, 3) 113 (11, 4) 114 (12, 2) 115 (13, 5) 116 (14, 6) 117 (15, 2) 118 >>> 119 120 >>> for index,i in enumerate(names): 121 print(index,i) 122 123 124 0 old_driver 125 1 rain 126 2 ['oldboy', 'oldgirl'] 127 3 jack 128 4 珊珊 129 5 peiqi 130 6 alex 131 7 black_girl 132 8 1 133 9 2 134 10 3 135 11 4 136 12 2 137 13 5 138 14 6 139 15 2 140 >>> 141 142 11.循環列表 打印索引值和元素 索引值為偶數時 對應得元素改成1 143 for index,i in enumerate(names): 144 if index % 2 == 0: 145 names[index] = 0 146 print(names) 147 148 12.names有3個2 返回第二個2得索引值 149 names = [-1, 'rain', -1, 'jack', -1, 'peiqi', -1, 'black_girl', -1, 2, -1, 4, -1, 5, -1, 2, 2] 150 first_index = names.index(2) 151 new_list = names[first_index+1:] 152 second_index = new_list.index(2) 153 second_val = names[first_index+second_index+1] 154 print(new_list,first_index,second_index) 155 print("second_val:",second_val) 156 157 13.打印商品列表 158 products = [['Iphone8',6888],['MacPro',14800],['小米6',2499],['Coffee',31],['Book',80],['Nike Shoes',799]] 159 print("-------商品列表------") 160 for index, i in enumerate(products): 161 print("%s. %s %s" % (index, i[0], i[1])) 162 163 164 14. 165 # 14 商品 不斷問用戶想買什么 用戶選擇一個商品編號 放在購物車里 最終用戶輸入q退出 打印 購物車商品列表 166 products = [['Iphone8',6888],['MacPro',14800],['小米6',2499],['Coffee',31],['Book',80],['Nike Shoes',799]] 167 shopping_cart = [] 168 169 # run_flag = True 170 exit_flag = False 171 172 while not exit_flag: 173 print("-------商品列表------") 174 for index, i in enumerate(products): 175 print("%s. %s %s" % (index, i[0], i[1])) 176 177 choice = input("輸入想買得商品編號：") 178 if choice.isdigit(): 179 choice = int(choice) 180 if choice >= 0 and choice < len(products): 181 shopping_cart.append(products[choice]) 182 print("Added products %s into shoppong_cart" % (products[choice])) 183 else: 184 print("商品不存在") 185 elif choice == 'q': 186 if len(shopping_cart) > 0: 187 print("------------你已購買以下商品----------") 188 for index,i in enumerate(shopping_cart): 189 print("%s. %s %s" % (index, i[0], i[1])) 190 # break 191 # run_flag = False 192 exit_flag = True

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轉載于:https://www.cnblogs.com/alice-bj/p/8427401.html

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