bicycles = ['trek', 'cannondale', 'redline', 'specialized']
print(bicycles[0])
print("Hello, " + bicycles[1].title() + "!")
message = "I would like to own a " + bicycles[-1].title() + " bicycle!"
print(message)
trek
Hello, Cannondale!
I would like to own a Specialized bicycle!
names = ['mike', 'tom', 'jason']
message = names[0].title() + ", I'd like to invite you to dinner."
print(message)
print(names[-1].title() + " can't keep the appointment.")
names[-1] = 'yangling'
print(names)
names.insert(0, 'jason')
names.insert(2, 'bob')
names.append('jack')
print(names)
name=names.pop()
print(name)
print(names)
del names[-1]
del names[-1]
del names[-1]
del names[-1]
del names[-1]
print(names)
Mike, I'd like to invite you to dinner.
Jason can't keep the appointment.
['mike', 'tom', 'yangling']
['jason', 'mike', 'bob', 'tom', 'yangling', 'jack']
jack
['jason', 'mike', 'bob', 'tom', 'yangling']
[]
citys = ['wuxi', 'changzhou', 'yancheng', 'nanjing', 'shanghai']
print(citys)
# sorted，不改变原始列表排序
print(sorted(citys))
print(citys)
print(sorted(citys, reverse=True))
print(citys)
# reverse，反向
citys.reverse()
print(citys)
citys.reverse()
print(citys)
citys.sort()
print(citys)
citys.sort(reverse=True)
print(citys)
print(len(citys))
['wuxi', 'changzhou', 'yancheng', 'nanjing', 'shanghai']
['changzhou', 'nanjing', 'shanghai', 'wuxi', 'yancheng']
['wuxi', 'changzhou', 'yancheng', 'nanjing', 'shanghai']
['yancheng', 'wuxi', 'shanghai', 'nanjing', 'changzhou']
['wuxi', 'changzhou', 'yancheng', 'nanjing', 'shanghai']
['shanghai', 'nanjing', 'yancheng', 'changzhou', 'wuxi']
['wuxi', 'changzhou', 'yancheng', 'nanjing', 'shanghai']
['changzhou', 'nanjing', 'shanghai', 'wuxi', 'yancheng']
['yancheng', 'wuxi', 'shanghai', 'nanjing', 'changzhou']
5