Python数据结构

柔情只为你懂 2022-06-15 12:11 155阅读 0赞

列表

shoplist =['apple','mango','carrpt','banana']
    print('I have',len(shoplist),'items to purchase.')
    
    print('This items are:',end=' ')
    for item in shoplist:
    	print(item,end=' ')
    
    print('\n I alse have to buy rice.')
    shoplist.append('rice')
    print('My shooping list is now',shoplist)
    
    print('I will sort my list now')
    shoplist.sort()
    print('Sorted shopping list is',shoplist)
    
    print('This first item I will buy is',shoplist[0])
    olditem = shoplist[0]
    del shoplist[0]
    print('I bought the',olditem)
    print('My shooping list is now',shoplist)

元组

zoo = ('python','elephant','penguin')
    
    print('Number of animals in the zoo is',len(zoo))
    
    new_zoo = 'monkey','camel',zoo 
    print('Number of cages in the new zoo is',len(new_zoo))
    print('All animal in new zoo are',new_zoo)
    print('Animals btought form old zoo is',new_zoo[2][2])
    
    print('Number of animals in the new zoo is',len(new_zoo)-1 + len(new_zoo[2]))

字典

ab = {
    	'Swaroop' : 'swaroop@163.com',
    	'Larry' : 'larry@126.com',
    	'Saharui' : '7651516@qq.com'
    }
    
    print(ab['Swaroop'])
    
    print('\nThere are {} contacts in the address=book\n'.format(len(ab)))
    
    for name,address in ab.items():
    	print('Contact {} at {}'.format(name,address))
    
    ab['Guido'] = 'guid@python.org'
    
    if 'Guido' in ab:
    	print('Guido a address is',ab['Guido'])

序列

shoplist = ['apple','mango','carrot','banana']
    
    name = 'swaroop'
    
    print('item 0 is {}'.format(shoplist[0]))
    print('item 1 is {}'.format(shoplist[1]))
    print('item 2 is {}'.format(shoplist[2]))
    print('item 3 is {}'.format(shoplist[3]))
    print('item -1 is {}'.format(shoplist[-1]))
    print('item -2 is {}'.format(shoplist[-2]))
    print('Character 0 is',name[0])
    
    #Slicing on a list #
    print('Item 1 to 3',shoplist[1:3])
    print('Item 2 to end',shoplist[2:])
    print('Item 1 to -1',shoplist[-1])
    print('Item start to end is' ,shoplist[:])
    
    #从某一字符串中切片 
    print('characters 1 to 3 is ',name[1:3])
    print('characters 2 to end is ',name[2:])
    print('characters 1 to -1 is',name[1:-1])
    print('characters start to end is',name[:])

引用

print('Simple Assignment')
    shoplist = ['apple','mango','carrot','banana']
    mylist = shoplist
    
    del shoplist[0]
    
    print('shoplist is',shoplist)
    print('mylist is',mylist)
    
    print('Copy by making a full slice')
    
    mylist = shoplist[:]
    
    del mylist[0]
    
    print('shoplist is',shoplist)
    print('mylist is',mylist)