函数里面的try，except异常

import paramiko
import time

def cisco(ip="10.10.10.5",username="qq",password="huawei",enable="huawei"):
    try:
       ssh_client = paramiko.SSHClient()
       ssh_client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
       ssh_client.connect(hostname=ip,username=username,password=password)
       print ("Successfully connect to", ip)
       remote_connection = ssh_client.invoke_shell()
       remote_connection.send("enable\n")
       remote_connection.send(enable + "\n")
       command = open("command.txt", 'r')
       remote_connection.send(command.read())
       command.seek(0)
       time.sleep(60)
       log = open(ip+".txt","a")
       log.write(remote_connection.recv(100000).decode('ascii'))
    except:
        error = open("error.txt","a")
        error.write(ip+"\n")

cisco（）

10.10.10.5这个host是存在，但用户名和密码是错误的，会出发异常处理，但我看了下。只执行了“error = open("error.txt","a")”这条语句，并没有执行“error.write(ip+"\n")”

import paramiko
import time

def cisco(ip="10.10.10.5",username="qq",password="huawei",enable="huawei"):
    error = open("error.txt","a")
    try:
       ssh_client = paramiko.SSHClient()
       ssh_client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
       ssh_client.connect(hostname=ip,username=username,password=password)
       print ("Successfully connect to", ip)
       remote_connection = ssh_client.invoke_shell()
       remote_connection.send("enable\n")
       remote_connection.send(enable + "\n")
       command = open("command.txt", 'r')
       remote_connection.send(command.read())
       command.seek(0)
       time.sleep(60)
       log = open(ip+".txt","a")
       log.write(remote_connection.recv(100000).decode('ascii'))
    except:
        error.write(ip+"\n")

cisco（)
如果写成这样，就能执行“error.write(ip+"\n")”