Python Workbooks--4th Chapter list

After-school exercises:

1.[] is an empty list

2.

1 ' Hello ') Wrong, should be: spam[2] = ' Hello '

3.[' d '] ' d '

4.[' d '] ' d '

5.[' A ', ' B ']

6.1

7.[3.14, ' cat ', One, ' cat ', True, 99]

8.[3.14, one, ' cat ', True]

9. Connect +, copy *

The 10.inset () method allows you to specify a position insertion

11.del and remove () methods

12.

13. The list can be modified, the meta-ancestors can not modify

14. ((42)) (42,)

15.tuple (); list ()

16. References

17.copy.deepcopy () can copy the list contained in the original variable to copy all lists in the list

Practical projects

4.10.1 Comma Code

1Spam = ['Apples','Bananas','Tofu','Cats','fishes']2 3 4 defLianjie (somelist):5result ="'6      forIinchRange (len (somelist)-1):7Result + = (Somelist[i] +',')8Result + = (' and'+ somelist[-1])9     Print(Result)Ten  OneLianjie (spam)

4.10.2-Character metalized grid

1Grid = [['.','.','.','.','.','.'],2['.','0','0','.','.','.'],3['0','0','0','0','.','.'],4['0','0','0','0','0','.'],5['.','0','0','0','0','0'],6['0','0','0','0','0','.'],7['0','0','0','0','.','.'],8['.','0','0','.','.','.'],9['.','.','.','.','.','.']]Ten  One  forJinchRange (6): A      forIinchRange (9): -         Print(Grid[i][j], end="')#print each element in a column -     Print(Grid[i][j])#finish a column and lay a column

Python Workbooks--4th Chapter list