按行读取文件

with open('1.txt', 'r') as f:    for line in f:        print line

按行读取gzip文件

import gzipdef x_read_gzip(filename):    with gzip.open(filename, 'rb') as f:        for line in f:            yield line

按行读取zip文件

import zipfiledef x_read_zip(filename):    zf = zipfile.ZipFile(filename, mode='r', compression=zipfile.zlib.DEFLATED)    stream = zf.open(zf.namelist()[0])    for line in stream:        yield line