为什么python对文件句柄数有限制? [英] Why python has limit for count of file handles?

问题描述

我写了简单的代码进行测试，python脚本中可以打开多少文件:

I writed simple code for test, how much files may be open in python script:

for i in xrange(2000):
    fp = open('files/file_%d' % i, 'w')
    fp.write(str(i))
    fp.close()

fps = []
for x in xrange(2000):
    h = open('files/file_%d' % x, 'r')
    print h.read()
    fps.append(h)

我得到一个例外

IOError: [Errno 24] Too many open files: 'files/file_509'

推荐答案

打开文件的数量受操作系统限制.在 linux 上你可以输入

The number of open files is limited by the operating system. On linux you can type

ulimit -n

看看限制是多少.如果你是root，你可以输入

to see what the limit is. If you are root, you can type

ulimit -n 2048

现在您的程序将运行正常(以 root 身份)，因为您已将打开文件的限制提高到 2048 个

now your program will run ok (as root) since you have lifted the limit to 2048 open files

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