shoplist = ['apple', 'mango', 'carrot', 'banana'] print('I have ', len(shoplist), ' items to purchase.') print('These items are: ', end = '') for item in shoplist: print(item, end = ' ') print('\nI also have to buy rice.') shoplist.append('rice') print('My shopping list is now ', shoplist) print('I will sort my list now') shoplist.sort() print('Sorted shopping list is ', shoplist) print('The first item I will buy is ', shoplist[0]) olditem = shoplist[0] del shoplist[0] print('I bought the ', olditem) print('My shopping list is now ', shoplist) 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 animals in new zoo are ',new_zoo) print('Animals brought from old zoo are', new_zoo[2]) print('Last animal brought from old zoo is ', new_zoo[2][2]) print('Number of animals in the new zoo is ', len(new_zoo) - 1 + len(new_zoo[2])) ab = { 'Swaroop' : 'Swaroop@Swaroopch.com', 'Larry' : 'larry@wall.org', 'Matsumoto' : 'matz@ruby-lang.org', 'Spammer' : 'spammer@hotmail.com' } print("Swaroop's address is ", ab['Swaroop']) del ab['Spammer'] print('\nThere are {0} contacts in the address-book\n'.format(len(ab))) for name, address in ab.items(): print('Contatc {0} at {1}'.format(name, address)) ab['Guido'] = 'guido@python.org' if 'Guido' in ab: print("\nGuido's address is ", ab['Guido']) name = 'Swaroop' print('Item 0 is ', shoplist[0]) print('Item 1 is ', shoplist[1]) print('Item 2 is ', shoplist[2]) print('Item 3 is ', shoplist[3]) print('Item -1 is ', shoplist[-1]) print('Item -2 is ', shoplist[-2]) print('Character 0 is ', name[0]) print('Item 1 to 3 is ',shoplist[1:3]) print('Item 2 to end is ',shoplist[2:]) print('Item 1 to -1 is ',shoplist[1:-1]) print('Item start to end is ',shoplist[:]) print('Character 1 to 3 is ', name[1:3]) print('Character 2 to end is ', name[2:]) print('Character 1 to -1 is ', name[1:-1]) print('Character start to end is ', name[:]) bri = set(['brazil', 'russia', 'India', 'China']) print('India' in bri)
时间: 2024-11-06 03:44:06