学习了从入门到实战的第七章while循环和第八章的函数部分
while 循环的使用很灵活 for循环不应修改链表,而while循环则可以遍历的同时进行修改.
unconfiremed_users = ['alice', 'brian', 'candace']
confirmed_users = []
while unconfirmed_users:
current_user = unconfirmed_users.pop()
print('Verifying user: ' + current_user.title())
confirmed_users.append(current_user)
print('\nThe following users have been confirmed:')
for confirmed_user in confirmed_users:
print(confirmed_user.title())
python的函数参数有默认值和关键字实参
