第3章--列表简介

#练习 3-1:
names = ['王力宏','陶喆','周杰伦']
for name in names:
    print(name)
#练习 3-2:
names = ['王力宏','陶喆','周杰伦']
for name in names:
    print(f'{name},早上好')
#练习 3-3:
ways = ['honda motocycle','Benz car']
for way in ways:
    print(f"I would like to own a {way}")
#练习 3-4:
guests = ['王力宏','陶喆','周杰伦']
for guest in guests:
    print(f'亲爱的{guest},我想邀请你来参加我的晚宴')
#练习 3-5:
print(f'{guest[2]}先生在准备新专辑，无法赴约')        
guests[2] = '邓紫棋'        
for guest in guests:
    print(f'亲爱的{guest},我想邀请你来参加我的晚宴')
#练习 3-6:
print('我找到了一个更大的餐桌！！')
guests.insert(0,'王冰冰')
guests.insert(2,'周星驰')
guests.append('刘德华')
for guest in guests:
    print(f'亲爱的{guest},我想邀请你来参加我的晚宴')
#练习 3-7:
print('物流太慢了，桌子来不及到达，因此我只能邀请两位客人...')
lenth_guests = len(guests)
for g in range(lenth_guests,0,-1):
    if len(guests)<=2:
        print(f"亲爱的{guests[g-1]},您仍在受邀者之列")
    else:
        give_up = guests.pop()
        print(f'亲爱的{give_up},我很抱歉这次不能邀请你了')
for guest in range(len(guests),0,-1):
    del guests[guest-1]
print(guests)
#练习 3-8:
#sort()和reverse()都是方法(返回值都是none，永久排序)，sorted()是函数(不返回空值，临时排序)
place = ['d','c','b','e','a']
print(place)
print(sorted(place))
print(place)
print(sorted(place,reverse = True))
print(place)
place.reverse()
print(place)
place.reverse()
print(place)
place.sort()
print(place)
place.sort(reverse = True)
print(place)
reversed(place)
print(place)
#小补充:字符串，元组，列表使用sorted()或reversed()方法排序的形式
str_ = 'woaini'
tuple_ = (5,6,2,9)
list_ = [4,3,9,6]
print(''.join(reversed(str_)))
print(tuple(sorted(tuple_)))
print(list(sorted(list_)))
#练习 3-9:
print(f'我邀请了{len(guests)}位客人来共进晚餐')
#练习 3-10:
#练习 3-11:    
#这两题没必要