如何使用 GUI 和 netmiko 正确使用函数

Question

我是编程新手，现在正在为我的网络工程师工作做一个小项目。

这个应用程序的整体思路：输入 IP、MAC、用户名、密码：然后查看以下功能的打印结果：

登录到设备！ 收集信息 等等

并在 print_out = tkinter.Text 框中实时显示所有这些信息

目前，我有 2 个 .py 文件： MAC_search_GUI.py MAC_search.py​​

MAC_search_GUI.py 是一个 tkinter 窗口，我可以在其中输入 IP、MAC、用户名和密码 +还有另一个窗口可以看到日志：

import tkinter 
from tkinter import Button, Text
from tkinter import simpledialog
from MAC_search import MAC_search_func

def show_entry_fields():
    IP = e1.get()
    MAC = e2.get()
    username = e3.get()
    password = e4.get()

    """
    e1.delete(0, tkinter.END)
    e2.delete(0, tkinter.END)
    e3.delete(0, tkinter.END)
    e4.delete(0, tkinter.END)
    """

    SESSION = {'ip': IP, 
                'device_type':'cisco_ios', 
                'username': username,
                'password': password}
    
    result = MAC_search_func(IP, MAC, **SESSION)
    return print(result)

#   f4b5.2fa0.8fca

root = tkinter.Tk()

tkinter.Label(root, text="IP:").grid(row=1)
tkinter.Label(root, text="MAC:").grid(row=2)
tkinter.Label(root, text="Username").grid(row=3)
tkinter.Label(root, text="Password").grid(row=4)

e1 = tkinter.Entry(root)
e2 = tkinter.Entry(root)
e3 = tkinter.Entry(root)
e4 = tkinter.Entry(root)

e1.grid(row=1, column=1)
e2.grid(row=2, column=1)
e3.grid(row=3, column=1)
e4.grid(row=4, column=1)


print_out = tkinter.Text(root, height = 20,  width = 60,  bg = "light cyan").grid(row=7, column=2)

tkinter.Button(root, text='Apply', command=show_entry_fields).grid(row=5, column=1, sticky=tkinter.W, 
pady=4)

root.geometry("600x600")

root.mainloop()

MAC_search_func 函数位于 MAC_search.py​​ 中，连接输入 IP 并收集有关该设备的信息：

import netmiko 
from netmiko import ConnectHandler
from netmiko.ssh_exception import NetMikoTimeoutException
from netmiko.ssh_exception import NetMikoAuthenticationException
from paramiko.ssh_exception import SSHException



def MAC_search_func(arg_ip, arg_mac, **arg_session):


    def conv_Po_to_Int(arg_int):
        JSON = connection.send_command("show etherchannel summary", use_textfsm=True)   
        for line in JSON: 
            if line['po_name'] == arg_int:
                int_status = line['interfaces']
        return int_status[0]


    interface = ''

    try: 
        connection = netmiko.ConnectHandler(**arg_session)                         
        print("Connection is succefull")
    except NetMikoTimeoutException:                                             
        return print(" ####  Device is not reachable!  ####")
    except NetMikoAuthenticationException:                                      
        return print(" ####  Wrong Username or Password!  ####") 
    except SSHException:                                                        
        return print(" ####  Make sure SSH is enabled!  ####")
    
    # Looking for MAC in Mac address table 
    JSON = connection.send_command("show mac address-table", use_textfsm=True)       
    for line in JSON: 
        if line['destination_address'] == arg_mac:
            interface = line['destination_port']
            # Checking if interface is Port channel 
            if interface[0:2] == "Po":
                interface = conv_Po_to_Int(interface)

    # IF MAC is not found 
    if interface == '':
        return print("This MAC-ADDRESS IS NOT FOUND ON THIS IP: "+ arg_ip)



    # If Mac was found on switch checking if Int is Trunk or Access
    JSON = connection.send_command("show interfaces status", use_textfsm=True) 
    for line in JSON: 
        if line['port'] == interface:
            int_status = line['vlan']


    # if port is trunk checking which device located on another end
    if int_status == "trunk":
        JSON = connection.send_command("show cdp neighbors " + interface, use_textfsm=True) 
        for line in JSON:
            next_switch = line['neighbor']
        JSON = connection.send_command("show cdp entry " + next_switch) 
        result = JSON.find('IP address:') 
        return print("Looks like this mac located on device with " + JSON[result:(result  + 21)] + " and hostname: " + next_switch) 
    else:
        return print("MAC was found on " + interface) 

    connection.disconnect()

所以，我有几个问题：

1. 我不知道如何将 RETURN 从我的 MAC_search 函数发送回 MAC_search_GUI，因此我可以使用以下命令进行打印：

     print_out = tkinter.Text(root, height = 20,  width = 60,  bg = "light cyan").grid(row=7, column=2)
   

2. 当我按下 应用 时，应用程序没有响应，直到所有功能都不会完成（5-10 秒），因为连接和从开关获取信息需要时间。如何在我点击Apply后，应用程序不会等到结束而是继续工作，直到Return不会出现在print_out > 窗口

Answer 1

对不起，桅杆，

解决办法是：

1. 我的第一个问题：

          result = MAC_search_func(IP, MAC, **SESSION)
          return print_out.insert("end-1c", result)
   

2. 对于我的第二个问题，我没有找到完整的解决方案，但它现在工作得更快了。