Question

我正在编写一个脚本以ssh连接到我拥有的所有开关，运行命令，然后获取输出并将其发送到文本文件。但是，我得到的输出需要过滤到一些有用的东西。我只需要知道接口及其所在的VLAN。我编写了另一个脚本来提取第一个脚本创建的文本文件，以进行文本过滤，但这还不够。我将代码发布到两者，以便您了解完整的上下文

f = open("vlancheck.txt", "a+")
hostname = "host here"
port = 22
username = getpass.getpass(prompt="Username: ") #used for hiding input
password = getpass.getpass()
command = "show interface status | e disabled"
string = " "

ssh = paramiko.SSHClient() #starts ssh client
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy()) #generates ssh key for all unknown hosts
ssh.connect(hostname, port=port, username=username, password=password) # logs in with the credentials stored in variables


stdin, stdout, stderr = ssh.exec_command(command) #manages input,output, and error data generated by the command sent
output = stdout.readlines() #reads the output as a list
print("\n".join(output))
f.write(hostname)
f.writelines(output) # writes the output as a list
f.close()

open("truncated.txt" , "w+").writelines([line for line in open("vlancheck.txt") if "Gi" in line])

我正在使用cisco开关，这是我通过过滤器脚本获得的输出：

Gi1/0/6 connected 708 a-full a-100 10/100/1000BaseTX Gi1/0/9 connected 708 a-full a-100 10/100/1000BaseTX

这很好，但我想将其简化为：

Gi1/0/6 connected 708 Gi1/0/9 connected 708

Answer 1

因此，假设我正确理解了您的问题，并且您提供的代码...您的输出Gi1/0/6 connected 708 a-full a-100 10/100/1000BaseTX会显示在以下行中：print("\n".join(output))

假设您的输出变量是一个列表，我在下面创建了一个示例：

output = ['Gi1/0/6','connected','708', 'a-full','a-100','10/100/1000BaseTX']
print('    '.join(output[0:3]))

返回：

Gi1/0/6     connected     708

Answer 2

如果要此输出Gi1/0/9 connected 70

使用regix re.sub()

这就是您的使用方式。

print re.sub(' +', ' ',output)

它将消除您使用的变量中的重复空格

Answer 3

感谢您的帮助。我确实自己弄清楚了。我将发布我的工作。这可能不是最好的，但绝对可以！！

with open("hosts.txt") as l:
    line = l.readline()
    print(line)
    while line is not None:
        for host in line:
            host = "".join(line)
            host = host.strip('\n')
            #print(host)
            ssh = paramiko.SSHClient() #starts ssh client
            ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy()) #generates ssh key for all unknown hosts
            ssh.connect(host, port=port, username=username, password=password) # logs in with the credentials stored in variables
            stdin, stdout, stderr = ssh.exec_command(command) #manages input,output, and error data generated by the command sent
            output = stdout.readlines() #reads the output as a list
            #print("\n".join(output))
            f.write(host + "\n")
            for i in output:
                if i.startswith("Gi"):
                    f.writelines(i[0:46] + "\n") # writes the output as a list
            line = l.readline()

如何缩短已写入文本文件的行的输出

3 个答案: