在python中读取.txt文件

Question

I have use the following code to read a .txt file:

f = os.open(os.path.join(self.dirname, self.filename), os.O_RDONLY)

And when I want to output the content I use this:

os.read(f, 10);

Which means that this method reads 10 bytes from the beginning of the file on. While I need to read the content as much as it is, using some values such as -1 and so. What should I do?

Answer 1

You have two options:

1. Call os.read() repeatedly.

2. Open the file using the open() built-in (as opposed to os.open() ), and just call f.read() with no arguments.

The second approach carries certain risk, in that you might run into memory issues if the file is very large.