Question

我刚刚安装了一个基础gentoo阶段3，当我尝试调用time.time（）时出现以下错误：

sbx / # python
import time
Python 2.7.1 (r271:86832, May 22 2011, 14:53:09)
[GCC 4.4.5] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import time
>>> time.time()
Traceback (most recent call last):
  File "", line 1, in 
IOError: [Errno 0] Error

我发现这是因为当我尝试运行emerge时，我得到：

sbx / # emerge
Traceback (most recent call last):
  File "/usr/bin/emerge", line 32, in 
    from _emerge.main import emerge_main
  File "/usr/lib/portage/pym/_emerge/main.py", line 6, in 
    import logging
  File "/usr/lib/python2.7/logging/__init__.py", line 94, in 
    _startTime = time.time()
IOError: [Errno 11] Resource temporarily unavailable

这是一个自定义内核，我只是确保我在RTC支持中编译，但仍然没有运气。关于为什么会发生这种情况的任何想法？

Answer 1

在自定义内核之前有效吗？启动到救援CD，chroot到你的gentoo环境，然后运行你的脚本。如果它有效，那就是你的内核。这和我一样具体。

Answer 2

这可能是你的问题吗？

http://bugs.gentoo.org/show_bug.cgi?id=330937

编辑 C测试代码

#include <stdio.h>
#include <sys/time.h>

typedef struct timeval _PyTime_timeval;

void _PyTime_gettimeofday(_PyTime_timeval *tp)
{
    /* There are three ways to get the time:
      (1) gettimeofday() -- resolution in microseconds
      (2) ftime() -- resolution in milliseconds
      (3) time() -- resolution in seconds
      In all cases the return value in a timeval struct.
      Since on some systems (e.g. SCO ODT 3.0) gettimeofday() may
      fail, so we fall back on ftime() or time().
      Note: clock resolution does not imply clock accuracy! */
#ifdef HAVE_GETTIMEOFDAY
#ifdef GETTIMEOFDAY_NO_TZ
    if (gettimeofday(tp) == 0)
        return;
#else /* !GETTIMEOFDAY_NO_TZ */
    if (gettimeofday(tp, (struct timezone *)NULL) == 0)
        return;
#endif /* !GETTIMEOFDAY_NO_TZ */
#endif /* !HAVE_GETTIMEOFDAY */
#if defined(HAVE_FTIME)
    {
        struct timeb t;
        ftime(&t);
        tp->tv_sec = t.time;
        tp->tv_usec = t.millitm * 1000;
    }
#else /* !HAVE_FTIME */
    tp->tv_sec = time(NULL);
    tp->tv_usec = 0;
#endif /* !HAVE_FTIME */
    return;
}


int main(int argc, char** argv) {
    _PyTime_timeval time;
    _PyTime_gettimeofday(&time);
    double tval = 0;
    tval = (double) time.tv_sec + time.tv_usec * 0.000001;

    printf("Time value was %f\n", tval);
}

如果我用gcc -DHAVE_GETTIMEOFDAY testtime.c编译它，我会得到一个工作时间输出，这就是python正在深入研究的内容。

也许在嵌入式平台上你需要说服python你的c库提供的时间函数是错误的，或者某些内容在内核/ C lib位中出现错误

Python time.time（） - ＆gt; IO错误

2 个答案: