python - linuxmint18.1如何提升网卡权限？

操作环境：
操作系统：Linux Mint18.1 Cinnamon 64-bit
Python版本：2.7.12

问题描述：
在学习Python黑客编程3网络数据监听和过滤1.2节 使用pypcap实时抓包这里初始化pcap类实例遇到错误。

按照教程我先使用ifconfig获取了电脑上的网卡信息。

$ ifconfig
enp4s0f2  Link encap:Ethernet  HWaddr 04:7d:7b:7f:dd:af  
          inet addr:222.20.104.41  Bcast:222.20.105.255  Mask:255.255.254.0
          inet6 addr: 2001:250:4000:8040:4cd2:279a:51cf:5f45/64 Scope:Global
          inet6 addr: fe80::c2c4:cdf9:a5ac:80df/64 Scope:Link
          inet6 addr: 2001:250:4000:8040:341c:9a13:8403:e3e2/64 Scope:Global
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:17464 errors:0 dropped:0 overruns:0 frame:0
          TX packets:10430 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:8705585 (8.7 MB)  TX bytes:1422248 (1.4 MB)

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:1949 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1949 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1 
          RX bytes:283488 (283.4 KB)  TX bytes:283488 (283.4 KB)

wlp9s0    Link encap:Ethernet  HWaddr 9c:b7:0d:a5:f0:77  
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

底下我模仿教程进行初始化pcap类实例的代码，然后就遇到了错误。错误提示是没有权限抓取该网卡信息。

Python 2.7.12 (default, Nov 19 2016, 06:48:10) 
[GCC 5.4.0 20160609] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import pcap
>>> pc1 = pcap.pcap('enp4s0f2')
Traceback (most recent call last):
  File "", line 1, in 
  File "pcap.pyx", line 203, in pcap.pcap.__init__ (pcap.c:1668)
OSError: enp4s0f2: You don't have permission to capture on that device (socket: Operation not permitted)
>>> pc2 = pcap.pcap('lo')
Traceback (most recent call last):
  File "", line 1, in 
  File "pcap.pyx", line 203, in pcap.pcap.__init__ (pcap.c:1668)
OSError: lo: You don't have permission to capture on that device (socket: Operation not permitted)
>>> pc3 = pcap.pcap('wlp9s0')
Traceback (most recent call last):
  File "", line 1, in 
  File "pcap.pyx", line 203, in pcap.pcap.__init__ (pcap.c:1668)
OSError: wlp9s0: You don't have permission to capture on that device (socket: Operation not permitted)

于是上网百度怎样提升网卡权限，但是并没有找到一个合适的方法。
这是找到的一条命令$ sudo chmod 777 /dev/bpf* 不过他的操作系统是MAC OS X，很自然的没有解决问题。
还有也试了$ ifconfig lo up 启动网卡，感觉应该没用，不过抱着死马当活马医的态度也试了，结果果然没有用。
哪位高手能帮忙解决一下问题呢？不胜感激。
（P.S. 这两天刚用上linuxmint操作系统，很多地方还不熟，正在学习中。）