python监控网卡流量

以下是使用Python监控网卡流量的示例代码：

import psutil
import time

def bytes_to_readable(bytes):
    suffixes = ['B', 'KB', 'MB', 'GB']
    index = 0
    while bytes >= 1024 and index < len(suffixes)-1:
        bytes /= 1024.0
        index += 1
    return f"{bytes:.2f} {suffixes[index]}"

def monitor_network():
    last_bytes_sent = 0
    last_bytes_recv = 0
    while True:
        net_io_counters = psutil.net_io_counters()
        bytes_sent = net_io_counters.bytes_sent
        bytes_recv = net_io_counters.bytes_recv
        if last_bytes_sent and last_bytes_recv:
            bytes_sent_diff = bytes_sent - last_bytes_sent
            bytes_recv_diff = bytes_recv - last_bytes_recv
            print(f"Bytes sent: {bytes_to_readable(bytes_sent_diff)}/s")
            print(f"Bytes received: {bytes_to_readable(bytes_recv_diff)}/s")
        last_bytes_sent = bytes_sent
        last_bytes_recv = bytes_recv
        time.sleep(1)

if __name__ == '__main__':
    monitor_network()

此代码使用psutil库来获取系统网络输入输出的字节数，并计算速率。它使用时间间隔为1秒的无限循环来监视流量。