Windows 中的 os.remove() 给出“[错误 32] 被另一个进程使用"； [英] os.remove() in windows gives "[Error 32] being used by another process"

问题描述

我知道这个问题在 SO 和其他地方也被问到了很多.我还是没能完成.如果我的英语不好，我很抱歉

I know this question has been asked before quiet a lot on SO and elsewhere too. I still couldn't get it done. And im sorry if my English is bad

在 linux 中删除文件要简单得多.只是 os.remove(my_file) 完成了这项工作，但在 Windows 中它给出了

Removing file in linux was much more simpler. Just os.remove(my_file) did the job, But in windows it gives

    os.remove(my_file)
WindowsError: [Error 32] The process cannot access the file because it is being used by another process: (file-name)

我的代码:

line_count = open(my_file, mode='r')        #
t_lines = len(line_count.readlines())       # For total no of lines
outfile = open(dec_file, mode='w')
with open(my_file, mode='r') as contents:
    p_line = 1
    line_infile = contents.readline()[4:]
    while line_infile:
        dec_of_line = baseconvert(line_infile.rstrip(),base16,base10)
        if p_line == t_lines:
            dec_of_line += str(len(line_infile)).zfill(2)
            outfile.write(dec_of_line + "\r\n")
        else:
            outfile.write(dec_of_line + "\r\n")
        p_line += 1
        line_infile = contents.readline()[4:]
outfile.close()
os.remove(my_file)

这里的my_file 是一个包含文件完整路径结构的变量.像明智的 dec_file 也包含路径，但是到一个新文件.我试图删除的文件是在 read mode 下使用的文件.需要一些帮助.

Here my_file is a variable that contains complete path structure of a file. Like wise dec_file also contains path, but to a new file. And the file im trying to remove is the file that's being used under read mode. Need some help please.

我的尝试:

1. 尝试关闭文件 my_file.close().我得到的相应错误是 AttributeError: 'str' object has no attribute 'close'.我知道，当一个文件在read mode 当它结束时它会自动关闭文件.但我还是试了一下
2. 也按照 https://stackoverflow.com/a 尝试了 os.close(my_file)/1470388/3869739.我得到的错误是 TypeError: an integer is required
3. 或者，我是否因为打开了文件而收到此错误两次(用于计算行数和读取文件内容)，..?

1. Tried closing the file my_file.close(). The corresponding error i got was AttributeError: 'str' object has no attribute 'close'. I knew, when a file is in read mode it automatically closes when it comes to the end of the file. But still i gave it a try
2. Also tried by os.close(my_file) as per https://stackoverflow.com/a/1470388/3869739. i got error as TypeError: an integer is required
3. Or, am i getting this error just because i have opened the file twice (for counting the line and to read the file content),..?

推荐答案

Pythonic 读取或写入文件的方式是使用 with 上下文.

Pythonic way of reading from or writing to a file is by using a with context.

读取文件:

with open("/path/to/file") as f:
    contents = f.read()
    #Inside the block, the file is still open

# Outside `with` here, f.close() is automatically called.

写:

with open("/path/to/file", "w") as f:
    print>>f, "Goodbye world"

# Outside `with` here, f.close() is automatically called.

<小时>

现在，如果没有其他进程读取或写入文件，并且假设您拥有所有权限，您应该能够关闭文件.很有可能存在资源泄漏(文件句柄未关闭)，因此 Windows 将不允许您删除文件.解决方案是使用with.

进一步澄清其他几点:

• 它是垃圾收集器，当对象被销毁时会导致流关闭.完成读取后，文件不会自动关闭.如果程序员想倒带，那没有意义，不是吗?
• os.close(..) 在内部调用 C-API close(..)，它接受一个整数文件描述符.不是你通过的字符串.

• Its the garbage collector that causes the closure of the stream when the object is destroyed. The file is not auto-closed upon complete reading. That wouldn't make sense if the programmer wanted to rewind, would it?
• os.close(..) internally calls the C-API close(..) that takes an integer file descriptor. Not string as you passed.

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