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kenwoodjw avatar kenwoodjw commented on June 11, 2024

写法不够简洁

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Pandaaaa906 avatar Pandaaaa906 commented on June 11, 2024

写法不够简洁

没明白写法不够简洁是什么意思。。。
这是第一个案例~

def get_lines(fp):
    with open(fp,'rb') as f:
        for line in f:
            yield line

这是第二个案例 用mmap~

from mmap import mmap, ACCESS_READ


def get_lines(fp):
    with open(fp,"r") as f:
        m = mmap(f.fileno(), 0, access=ACCESS_READ)
        tmp = 0
        for i, char in enumerate(m):
            if char==b"\n":
                yield m[tmp:i+1].decode()
                tmp = i+1
        if tmp<i:
            yield m[tmp:i+1].decode()

if __name__=="__main__":
    for i in get_lines("fp_some_huge_file"):
        print(i)

而且你第一题的代码漏了个单引号~
修改了下 原来的代码把最后一行没有换行符的情况漏了~

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