如何使用PySimpleGUI构建具有工作python脚本的GUI

我正在使用一个内置于Python3中的程序，该程序计算出我应该使用哪个VIP（虚拟IP）子网，以及VIP应该与哪个负载平衡器匹配。程序将询问您池成员之一的IP地址。基于此，它将告诉您需要从VIP为哪个子网提供IP地址，以及在哪个负载平衡器上构建VIP。一个简单工作脚本的已编辑示例在linux设备上运行，如下所示：

from netaddr import IPNetwork, IPAddress, IPSet

global subnet
global loadbalancer

member = IPAddress(input("What is the IP address of one of the nodes? "))

# Lists for each LB pair containing the node subnets.
loadbalancer1_node_IPs = IPSet([IPNetwork('1.1.1.0/22'), IPNetwork('2.2.2.0/22'), IPNetwork('3.3.3.0/22')])
loadbalancer2_node_IPs = IPSet([IPNetwork('4.4.4.0/23'), IPNetwork('2.2.2.0/23'), IPNetwork('3.3.3.0/23')])


# Provides the LB the VIP is to be built on based on node IP address.
if IPAddress(member) in loadbalancer1_node_IPs:
    loadbalancer = "The LB pair you need to build this VIP on is loadbalancer1_node_IPs"
    subnet = "You need a VIP ip from subnet 1.1.1.0/22, 2.2.2.0/22, or 3.3.3.0/22"
elif IPAddress(member) in loadbalancer2_node_IPs:
    loadbalancer = "The LB pair you need to build this VIP on is loadbalancer2_node_IPs"
    subnet = "You need a VIP ip from subnet 4.4.4.0/23, 2.2.2.0/23, or 3.3.3.0/23"


print(loadbalancer)
print(subnet)
exit(input("Press Enter to exit."))

在linux上使用cli，这些脚本可以正常工作。我现在的目标是使用python包PySimpleGUI构建一个输出结果的GUI。我正在尝试将上面的代码与下面的PySimpleGUI代码结合起来：

import PySimpleGUI as sg

form = sg.FlexForm('F5 Load Balancer VIP IP and LB selector')

layout = [ [sg.Text('What is the IP address of one of the nodes'), sg.InputText()],
           [sg.OK()] ]

button, (name,) = form.Layout(layout).Read()

我很难得到结果的基本输出。我试着用

window = sg.Window('Test').Layout(layout) 

并用

window.FindElement('loadbalancer').Update(loadbalancer) 

但是窗口会显示错误

"Error creating layout. The layout specified has already been used.". 

---

感谢您的帮助。多谢各位

如果您将代码放入函数中，以便可以将其导入到其他脚本中，可能会更容易

vip.py

from netaddr import IPNetwork, IPAddress, IPSet

def run(ip):
    member = IPAddress(ip)

    # Lists for each LB pair containing the node subnets.
    loadbalancer1_node_IPs = IPSet([IPNetwork('1.1.1.0/22'), IPNetwork('2.2.2.0/22'), IPNetwork('3.3.3.0/22')])
    loadbalancer2_node_IPs = IPSet([IPNetwork('4.4.4.0/23'), IPNetwork('2.2.2.0/23'), IPNetwork('3.3.3.0/23')])

    # Provides the LB the VIP is to be built on based on node IP address.
    if IPAddress(member) in loadbalancer1_node_IPs:
        loadbalancer = "The LB pair you need to build this VIP on is loadbalancer1_node_IPs"
        subnet = "You need a VIP ip from subnet 1.1.1.0/22, 2.2.2.0/22, or 3.3.3.0/22"
    elif IPAddress(member) in loadbalancer2_node_IPs:
        loadbalancer = "The LB pair you need to build this VIP on is loadbalancer2_node_IPs"
        subnet = "You need a VIP ip from subnet 4.4.4.0/23, 2.2.2.0/23, or 3.3.3.0/23"
    else:
        loadbalancer = "?"
        subnet = "?"

    return loadbalancer, subnet

if __name__ == "__main__":
    # this part is not executed when script is imported to other script
    ip = input("What is the IP address of one of the nodes? ")
    loadbalancer, subnet = run(ip)
    print(loadbalancer)
    print(subnet)
    exit(input("Press Enter to exit."))

import vip
import PySimpleGUI as sg

form = sg.FlexForm('F5 Load Balancer VIP IP and LB selector')

layout = [ 
    [sg.Text('What is the IP address of one of the nodes'), sg.InputText(key='IP')],
    [sg.OK()] 
]

button, values = form.Layout(layout).Read()

ip = values['IP']
loadbalancer, subnet = vip.run(ip)

form = sg.FlexForm('F5 Load Balancer VIP IP and LB selector')

layout = [ 
    [sg.Text(ip)],
    [sg.Text(loadbalancer)],
    [sg.Text(subnet)],
    [sg.OK()] 
]

button, values = form.Layout(layout).Read()

现在在GUI中，您可以使用

import vip

loadbalancer, subnet = vip.run(ip)

像

gui.py

from netaddr import IPNetwork, IPAddress, IPSet

def run(ip):
    member = IPAddress(ip)

    # Lists for each LB pair containing the node subnets.
    loadbalancer1_node_IPs = IPSet([IPNetwork('1.1.1.0/22'), IPNetwork('2.2.2.0/22'), IPNetwork('3.3.3.0/22')])
    loadbalancer2_node_IPs = IPSet([IPNetwork('4.4.4.0/23'), IPNetwork('2.2.2.0/23'), IPNetwork('3.3.3.0/23')])

    # Provides the LB the VIP is to be built on based on node IP address.
    if IPAddress(member) in loadbalancer1_node_IPs:
        loadbalancer = "The LB pair you need to build this VIP on is loadbalancer1_node_IPs"
        subnet = "You need a VIP ip from subnet 1.1.1.0/22, 2.2.2.0/22, or 3.3.3.0/22"
    elif IPAddress(member) in loadbalancer2_node_IPs:
        loadbalancer = "The LB pair you need to build this VIP on is loadbalancer2_node_IPs"
        subnet = "You need a VIP ip from subnet 4.4.4.0/23, 2.2.2.0/23, or 3.3.3.0/23"
    else:
        loadbalancer = "?"
        subnet = "?"

    return loadbalancer, subnet

if __name__ == "__main__":
    # this part is not executed when script is imported to other script
    ip = input("What is the IP address of one of the nodes? ")
    loadbalancer, subnet = run(ip)
    print(loadbalancer)
    print(subnet)
    exit(input("Press Enter to exit."))

import vip
import PySimpleGUI as sg

form = sg.FlexForm('F5 Load Balancer VIP IP and LB selector')

layout = [ 
    [sg.Text('What is the IP address of one of the nodes'), sg.InputText(key='IP')],
    [sg.OK()] 
]

button, values = form.Layout(layout).Read()

ip = values['IP']
loadbalancer, subnet = vip.run(ip)

form = sg.FlexForm('F5 Load Balancer VIP IP and LB selector')

layout = [ 
    [sg.Text(ip)],
    [sg.Text(loadbalancer)],
    [sg.Text(subnet)],
    [sg.OK()] 
]

button, values = form.Layout(layout).Read()

---

根据furas发布的布局，这些是PySimpleGUI当前使用的编码约定。您还需要添加呼叫以关闭窗口

以下是基于最新命名和编码约定的GUI更新版本：

导入vip
将PySimpleGUI导入为sg
布局=[
[sg.Text（'其中一个节点的IP地址是什么'），sg.InputText（key='IP'），
[sg.OK（）]
]
window=sg.window（'F5负载平衡器VIP IP和LB选择器'，布局）
事件，值=window.read（）
window.close（）
ip=值['ip']
负载平衡器，子网=vip.run（ip）
布局=[
[sg.文本（ip）]，
[sg.Text（负载平衡器）]，
[sg.文本（子网）]，
[sg.OK（）]
]
window=sg.window（'F5负载平衡器VIP IP和LB选择器'，布局）
事件，值=window.read（）
window.close（）

所有创建外部函数的变量都是全局变量，因此使用

全局子网

和

全局负载平衡器

是无用的。Word

global

在函数内部用于通知函数它必须使用外部/全局变量，而不是创建局部变量。始终将问题中的完整错误消息（从Word“Traceback”开始）作为文本（而不是屏幕截图）提出来（不是注释）。还有其他有用的信息。

.Update（loadbalancer）

中的

负载平衡器是什么？此变量只存在于其他脚本中，您不需要导入，因此无法在GUI中访问。最好将代码放入第一个脚本的函数中，将此函数导入第二个脚本，然后在第二个脚本中执行。这样，您可以直接在变量中获得结果。您可以跳过退出（输入（））

@furas谢谢您的回复。对不起，我应该澄清一下。我试图把代码“弗兰肯斯坦”在一起，但我哪儿也不去。我发布的脚本和PySimpleGUI代码分别工作得很好，这就是我发布它的方式，以显示它的基本功能。我只是不知道如何将脚本组合到GUI中。回顾一下代码，我发现我可以删除这个部分。