2022-08-26 学习Python-Day9

wyh551202

今日学习列表P34，P35，P36
学习中我发现一个问题 sorted()的方法可以直接print，但是.sort必须单独声明下，不然print(t.sort(key=len)) 值为None，希望大家注意下 。

1. 
   
2. t=['FishC','Apple','Book','banana','Pen']
   
3. print(sorted(t))
   
4. print(sorted(t,key=len))
   
5. t=['FishC','Apple','Book','banana','Pen']
   
6. t.sort(key=len)
   
7. print(t)
   

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1. ################################P34
   
2. x=[1,2,3]+[4,5,6]
   
3. print(x)
   
4. x=(1,2,3)+(4,5,6)
   
5. print(x)
   
6. x='123'+'456'
   
7. print(x)
   
8. x=[1,2,3]*3
   
9. print(x)
   
10. x=(1,2,3)*3
    
11. print(x)
    
12. x='123'*3
    
13. print(x)
    
14. ###########
    
15. s=[1,2,3]
    
16. print(id(s))
    
17. s *=2
    
18. print(id(s))
    
19. t=(1,2,3)
    
20. print(id(t))
    
21. t=t*2
    
22. print(id(t))
    
23. ###########
    
24. x=[1,2,3]
    
25. y=[1,2,3]
    
26. print(x is y)
    
27. print('Fish' in 'FishC')
    
28. x=[1,2,3,4,5]
    
29. del x[1:4]
    
30. print(x)
    
31. y=[1,2,3,4,5]
    
32. y[1:4]=[]
    
33. print(y)
    
34. x=[1,2,3,4,5]
    
35. del x[::2]
    
36. print(x)
    
37. x=[1,2,3,4,5]
    
38. x.clear()
    
39. print(x)
    
40. x=[1,2,3,4,5]
    
41. del x[:]
    
42. print(x)
    
43. ################################P35
    
44. list1=list('FishC')
    
45. print(list1)
    
46. tuple1=tuple('FishC')
    
47. print(tuple)
    
48. str1=str([1,2,3,4])
    
49. print(str1,type(str1))
    
50. ############
    
51. s=[1,1,2,3,5]
    
52. print(min(s))
    
53. t='FishC'
    
54. print(max(t))
    
55. s=[]
    
56. print(min(s,default='撒都没有'))
    
57. print(min(1,2,3,0,6))
    
58. ############
    
59. print(len(range(2*100)))
    
60. ############
    
61. s=[1,0,0,8,6]
    
62. print(sum(s))
    
63. print(sum(s,start=100))
    
64. ############
    
65. s=[1,2,3,0,6]
    
66. s=sorted(s)
    
67. print(s)
    
68. print(sorted(s,reverse=True))
    
69. t=['FishC','Apple','Book','banana','Pen']
    
70. print(sorted(t))
    
71. print(sorted(t,key=len))
    
72. t=['FishC','Apple','Book','banana','Pen']
    
73. t.sort(key=len)
    
74. print(t)
    
75. s=[1,2,5,8,0]
    
76. sr=reversed(s)
    
77. print(sr)
    
78. height=[1,8,6,2,5,4,8,3,7]
    
79. height_reverse=list(reversed(height))
    
80. print(height_reverse)
    
81. s=list(reversed("FishC"))
    
82. print(s)
    
83. ################################P36
    
84. x=[1,1,0]
    
85. y=[1,1,9]
    
86. print(all(x))
    
87. print(all(y))
    
88. seasons=['spring','summer','fall','winter']
    
89. s=enumerate(seasons)
    
90. print(s)
    
91. ss=list(enumerate(seasons))
    
92. print(ss)
    
93. x=[1,2,3]
    
94. y=[4,5,6,7,8,9]
    
95. xy=zip(x,y)
    
96. z='FishC'
    
97. xy=zip(x,y,z)
    
98. print(list(xy))
    
99. import itertools
    
100. xy=itertools.zip_longest(x,y,z)
     
101. print(list(xy))
     
102. mapped=map(ord,'FishC')
     
103. print(list(mapped))
     
104. mapped=map(pow,[2,3,10],[5,6,3])
     
105. print(list(mapped))
     
106. mapped=[pow(2,5),pow(3,2),pow(10,3)]
     
107. print(list(mapped))
     
108. print(list(filter(str.islower,'FishC')))
     
109. ##############
     
110. mapped =map(ord,'FishC')
     
111. for each in mapped:
     
112.     print(each)
     
113. print(list(mapped))
     
114. x=[1,2,3,4,5]
     
115. y=iter(x)
     
116. print(y,type(y))
     
117. for i in range(len(x)):
     
118.     print(next(y))
     
119.    
     

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