生成器-文件内容

"""用户需要查询文件，针对文件内容进行筛选，并且输出"""
def lin(filename,aim):
    with open(filename,encoding='utf-8') as f:
        for i in f:
            if aim in i:
                yield i
g=lin('正则.py','装饰器')
for l in g:
    print(l.strip())