Python list.remove()缺陷，解决remove无法移除元素问题

例子：

with open('email.txt') as f:
    email_list = f.read().split('\n') 
print(email_list) # ['xiaosaxu@yeah.net', '', '']

for i in email_list:
    if not i:
        email_list.remove(i)
print(email_list) # ['xiaosaxu@yeah.net', '']


email_list2=[]
for i in email_list:
    if '@' in i:
        email_list2.append(i)
print(email_list2)  # ['xiaosaxu@yeah.net']

综上： 删除列表中的元素不能用remove(),必须另外建立列表将符合的元素存进去