Python TypeError：execv（）arg 2必须只包含字符串

我有一个下面的代码被写入来获得Linux上当前运行的接口的速度，但是当我运行这个脚本时它只是抛出错误：TypeError: execv() arg 2 must contain only strings。Python TypeError：execv（）arg 2必须只包含字符串

将不胜感激任何帮助或想法。

Below is the script:

在下面脚本我创建 1 2个功能）的一个是get_Inf()这给界面的信息。 2）第二个是get_intSpeed()，它从第一个functon获取接口名称并将其传递给os命令ethtool，该命令通过正则表达式进一步解析为仅获取速度，如1000Mb/s。

#!/grid/common/pkgs/python/v2.7.10/bin/python 
import subprocess 
import netifaces 
import re 

''' This snippet is just to get the Speed of the running interface on the System ''' 



def get_Inf(): 
    Current_inf = netifaces.gateways()['default'][netifaces.AF_INET][1] 
    return get_Inf 

def get_intSpeed(): 
    spd = subprocess.Popen(['/sbin/ethtool', get_Inf()], stdout=subprocess.PIPE).communicate()[0] 
    pat_match=re.search(".*Speed:\s+(\d+Mb/s)\s+.*", spd)  # "d" means any number of digit following the "Mb/s". 
    speed = pat_match.group(1) 
    return speed 

def main(): 
    print get_intSpeed() 


main()

Below is the os command /sbin/ethtool which has the Speed information of the Interface along with Other Information.

[[email protected] /]# /sbin/ethtool eth0| grep Speed 
       Speed: 1000Mb/s 
[[email protected] /]# ethtool eth0 
Settings for eth0: 
     Supported ports: [ TP ] 
     Supported link modes: 10baseT/Half 10baseT/Full 
           100baseT/Half 100baseT/Full 
           1000baseT/Full 
     Supported pause frame use: No 
     Supports auto-negotiation: Yes 
     Advertised link modes: 10baseT/Half 10baseT/Full 
           100baseT/Half 100baseT/Full 
           1000baseT/Full 
     Advertised pause frame use: No 
     Advertised auto-negotiation: Yes 
     Speed: 1000Mb/s 
     Duplex: Full 
     Port: Twisted Pair 
     PHYAD: 1 
     Transceiver: internal 
     Auto-negotiation: on 
     MDI-X: Unknown 
     Supports Wake-on: g 
     Wake-on: g 
     Link detected: yes

我使用的Python版本2.7.10。

来源

2017-04-25 krock1516

请显示整个错误。您发布的代码不会调用'execv'。至少，不直接。 –

@BryanOakley，感谢您的反馈，我意识到我正在回应错误的价值观。 – krock1516

您的get_Inf()函数将返回return get_Inf声明，这不是一个字符串，这就是为什么execv（它被subprocess.Popen调用）在抱怨。您应该从您的功能返回Current_Inf。

来源

2017-04-25 08:45:11

艾伯特P，谢谢你的确抓住了。虽然我意识到这一点。 – krock1516

Python TypeError：execv（）arg 2必须只包含字符串

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