# confirmed_users
unconfirmed_users = ['chow', 'zhang', 'yang', 'chen']
confirmed_users = []
# 验证每个用户,直到未验证用户数量为0
while unconfirmed_users:
current_user = unconfirmed_users.pop()
print(current_user)
print(f"Verifying_user:{current_user.title()}")
confirmed_users.append(current_user)
print("\nThe following users has been confirmed:")
for confirmed_user in confirmed_users:
print(confirmed_user.title())
while和列表结合使用,巧妙运用了pop函数