Question

我有以下code written by Michael 用于廉价查找linecount但是当我运行它时，它给出了一个错误AttributeError File object has no attribute 'raw'错误，我不知道为什么会发生这种情况。以下是供参考的代码，我们非常感谢任何帮助

from itertools import (takewhile,repeat)

def _make_gen(reader):
    b = reader(1024 * 1024)
    while b:
        yield b
        b = reader(1024*1024)

def rawpycount(filename):
    f = open(filename, 'rb')
    f_gen = _make_gen(f.raw.read)
    return sum( buf.count(b'\n') for buf in f_gen )

Answer 1

将SQL> insert into 2 (select deptno, dname from dept where dname <> 'new department' WITH CHECK OPTION) 3 values (99, 'new department'); (select deptno, dname from dept where dname <> 'new department' WITH CHECK OPTION) * ERROR at line 2: ORA-01402: view WITH CHECK OPTION where-clause violation更改为_make_gen(f.raw.read)。

Python 3.x默认使用unicode，因此_make_gen(f.read)转换为字节。另一方面，Python 2.x默认使用字节，因此不需要任何其他内容。

AttributeError文件对象没有属性＆＃39; raw＆＃39;错误

1 个答案: