小练习-请客吃饭

#邀请3个人一起共进晚餐
name = ['jacky','kevin','bob']
for i in name:
    print('Welcom %s join my dinner'% i )

#bob不能参加
a = 'bob'
d_name = name.remove(a)
print('%s is no going to jion my dinner' % a)

#新增加一个人luccy
name.append('luccy')
for i in name:
    print('Welcom %s join my dinner'% i)

#有更好的地方，又有3个人要加入我们（3个人加到最前面、中间、最后）
print('We have better place,3 friends will jion us')
name.insert(0,'user1')
name.insert((len(name)//2),'user2')
name.append('user3')
for i in name:
    print('Welcom %s join my dinner'% i)

#只能邀请2个人参加了，删除人员只留两个人，并通知他们
print('We just have two firends can jion my dinner')
num = len(name)
for i in range(num):
    name2 = name.pop()
    print('Sorry %s' % name2)
    if num - i == 3:
        break
for i in name:
    print('Welcom %s join my dinner'% i)

#删除所有人，清空人员名单
for i in range (len(name)):
    del name[0]

print("%s list is empty" % name)