python - 在 Python 中检测网络是否空闲

Question

我正在制作一个基于 Python 的下载器。截至目前，我有一个基于多处理的控制台脚本。我想知道如何检测网络是否空闲。即，用户自己不使用网络(浏览、冲浪等)。

在这方面它应该能够做两件事:

1. 检测到网络空闲时恢复下载。
2. 检测到某些网络事件时暂停下载。

定义“空闲”的一种方法可能是在网络事件连续 5 分钟处于最大带宽的 1% 时触发。

有没有更好的方法来检测网络是否空闲？

Answer 1

我建议使用 psutil.network_io_counters 模块:

Return network I/O statistics as a namedtuple including the following attributes:

• bytes_sent: number of bytes sent
• bytes_recv: number of bytes received
• packets_sent: number of packets sent
• packets_recv: number of packets received
• errin: total number of errors while receiving
• errout: total number of errors while sending
• dropin: total number of incoming packets which were dropped
• dropout: total number of outgoing packets which were dropped (always 0 on OSX and BSD)

If pernic is True return the same information for every network interface installed on the system as a dictionary with network interface names as the keys and the namedtuple described above as the values.

In [1]: import psutil
In [2]: psutil.network_io_counters(pernic=True)
Out[2]:
{'en0': iostat(bytes_sent=143391435L, bytes_recv=1541801914L,
               packets_sent=827983L, packets_recv=1234558L, errin=0L, errout=0L,
               dropin=0L, dropout=0),
 'gif0': iostat(bytes_sent=0L, bytes_recv=0L, packets_sent=0L, packets_recv=0L,
                errin=0L, errout=0L, dropin=0L, dropout=0),
 'lo0': iostat(bytes_sent=6143860L, bytes_recv=6143860L, packets_sent=55671L,
               packets_recv=55671L, errin=0L, errout=0L, dropin=0L, dropout=0),
 'p2p0': iostat(bytes_sent=0L, bytes_recv=0L, packets_sent=0L, packets_recv=0L,
                errin=0L, errout=0L, dropin=0L, dropout=0),
 'stf0': iostat(bytes_sent=0L, bytes_recv=0L, packets_sent=0L, packets_recv=0L,
                errin=0L, errout=0L, dropin=0L, dropout=0)
}

您可以跟踪要监控的接口(interface)上发送和接收的字节，这将为您提供网络空闲或繁忙的信息。