4.4使用列表的一部分

　　4.4.1切片

players = ['charles', 'martina', 'michael', 'florence', 'eli']
print(players[0:3])

['charles', 'martina', 'michael']

4.4.2 遍历切片

players = ['charles', 'martina', 'michael', 'florence', 'eli']
print("Here are the first three players on my team:")
for player in players[:3]:
    print(player.title())

Charles
Martina
Michael

4.4.3 复制列表

my_foods = ["pizza", 'falafel', 'carrot cake']
friends_foods = my_foods[:]
print("My favorite foods are:")
print(my_foods)
print("\nMy friend's favorite foods are:")
print(friends_foods)

My favorite foods are:
['pizza', 'falafel', 'carrot cake']

My friend's favorite foods are:
['pizza', 'falafel', 'carrot cake']

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