【8.5】生成器如何读取大文件

#!/usr/bin/env python
# -*- coding:utf-8 -*-


def MyReadLines(f, newline):
    buf = ''
    while True:
        while newline in buf:
            pos = buf.index(newline)
            yield buf[:pos]
            buf = buf[pos + len(newline):]
        chunk = f.read(4096*10)
        if not chunk:
            # 说明已经读到了文件结尾，处理最后一条数据
            yield buf
            break
        buf += chunk


with open('read_file.txt') as f:
    for line in MyReadLines(f, '{|}'):
        print(line)

asdjkhaskjfdhaskhd
 asdjalskhdkjashgkdyoias
 asdjaslhdiasghfou
 wiuqoxgsabjkdg
 ashdoqwhdasjdha
 as;djoqwhdohqwodhg

　　文件中的数据，一行且很大

with open(filePath) as f:
    for line in f:
        print(line)
        # Processing data

　　文件数据大，但是多行