• del|append()|insert()|pop()|remove()|sort()|sorted|reverse()|len()|range()|min()|max()|sum()|[:]|区分两种列表复制|


      1 fruit = ['apple','banana','peach']
      2 print fruit[0],fruit[-1]
      3 
      4 fruit_1 =[]
      5 fruit_1.append('orange')
      6 print fruit_1
      7 
      8 fruit.insert(1,'orange')
      9 del fruit[2]
     10 print fruit
     11 
     12 '''
     13 apple peach
     14 ['orange']
     15 ['apple', 'orange', 'peach']
     16 '''
     17 
     18 pop_1 = fruit.pop(1)
     19 print pop_1,"
    ",fruit
     20 
     21 '''
     22 orange
     23 ['apple', 'peach']
     24 '''
     25 
     26 apple = 'apple'
     27 fruit.remove(apple)
     28 print fruit,"
    ",fruit_1
     29 
     30 '''
     31 ['peach']
     32 ['orange']
     33 '''
     34 
     35 fruit_2 = ['a','b','c','d','e','f']
     36 fruit = fruit_1 + fruit_2
     37 print fruit
     38 
     39 '''
     40 ['orange', 'a', 'b', 'c', 'd', 'e', 'f']
     41 '''
     42 new_fruit = sorted(fruit,reverse=True)
     43 print fruit,"
    ",new_fruit
     44 new_fruit.sort(reverse=True)
     45 print new_fruit
     46 new_fruit.reverse()
     47 print new_fruit
     48 
     49 '''
     50 ['orange', 'a', 'b', 'c', 'd', 'e', 'f']
     51 ['orange', 'f', 'e', 'd', 'c', 'b', 'a']
     52 ['orange', 'f', 'e', 'd', 'c', 'b', 'a']
     53 ['a', 'b', 'c', 'd', 'e', 'f', 'orange']
     54 
     55 '''
     56 
     57 length = len(new_fruit)
     58 print length
     59 
     60 #7
     61 
     62 #empty = []
     63 #iprint empty[-1]
     64 
     65 '''
     66 Traceback (most recent call last):
     67       File "t.py", line 61, in <module>
     68           print empty[-1]
     69           IndexError: list index out of range
     70 '''
     71 
     72 for i in new_fruit:
     73     print i
     74 print i
     75 
     76 '''
     77 a
     78 b
     79 c
     80 d
     81 e
     82 f
     83 orange
     84 orange
     85 '''
     86 
     87 new_list = list(range(1,15,3))
     88 print new_list
     89 
     90 #[1, 4, 7, 10, 13]
     91 
     92 max_in_list = max(new_list)
     93 min_in_list = min(new_list)
     94 sum_in_list = sum(new_list)
     95 print max_in_list,"
    ",min_in_list,"
    ",sum_in_list
     96 
     97 '''
     98 13
     99 1
    100 35
    101 '''
    102 double=[i**2 for i in range(1,20)]
    103 new_double = double[:]
    104 print new_double
    105 print double[4:]
    106 
    107 #[1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144, 169, 196, 225, 256, 289, 324, 361]
    108 #[25, 36, 49, 64, 81, 100, 121, 144, 169, 196, 225, 256, 289, 324, 361]
    109 
    110 for single in double[5:-1]:
    111     print single
    112 
    113 '''
    114 36
    115 49
    116 64
    117 81
    118 100
    119 121
    120 144
    121 169
    122 196
    123 225
    124 256
    125 289
    126 324
    127 '''
    128 new_double_2 = double
    129 double.pop(0)
    130 print double
    131 print new_double_2
    132 print new_double
    133 
    134 '''
    135 [4, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144, 169, 196, 225, 256, 289, 324, 361]
    136 [4, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144, 169, 196, 225, 256, 289, 324, 361]
    137 [1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144, 169, 196, 225, 256, 289, 324, 361]
    138 '''
    139 
    140 new_double[1] =2500000000000
    141 print new_double
    142 
    143 #[1, 2500000000000, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144, 169, 196, 225, 256, 289, 324, 361]
    144 
    145 scale = [1,8]
    146 for number in scale:
    147     print number
    148 
    149 
    150 scale = (1,8)
    151 for number in scale:
    152     print number
    153 
    154 '''
    155 1
    156 8
    157 1
    158 8
    159 '''

    问题:列表可以用[ ]or( )???

     1 scale = [1,8]
     2 for number in scale:
     3     print number
     4 
     5 
     6 scale = (1,8)
     7 for number in scale:
     8     print number
     9 
    10 '''
    11 1
    12 8
    13 1
    14 8
    15 '''
  • 相关阅读:
    02-30 线性可分支持向量机
    02-28 scikit-learn库之线朴素贝叶斯
    02-27 朴素贝叶斯
    02-26 决策树(鸢尾花分类)
    047 选项模式
    第二节:师傅延伸的一些方法(复习_总结)
    第一节:登录流程
    第一节:对应拼音编码查询(后续更新)
    前端对象
    Form表单
  • 原文地址:https://www.cnblogs.com/yuanjingnan/p/11128962.html
Copyright © 2020-2023  润新知