如何在 python（Kivy 框架）中获取用户输入

Question

I am trying to make a software in python (Kivy framework), my software will be capable of testing how strong are wifi passwords.

I have encountered a issue. How do I get the user input in my.kv (kivy) file to my.py (python) file?

.PY FILE :

from kivy.app import App
from kivy.properties import StringProperty
from kivy.uix.floatlayout import FloatLayout
try:
    from wifidroid.wifi import WifiManager
except:
    pass
from kivy.uix.textinput import TextInput
import kivymd, kivy
try:
    import wifidroid
except:
    pass
from kivy.uix.label import Label
from kivy.uix.button import Button

text = 'testttt'

try:
    wifi = WifiManager()
    wifi.startScan()
    wifi.EnabledWifi(True)
    for i in range(wifi.ScanResults.size()):
        ssid = [wifi.ScanResults.get(i).SSID]
        bssid = [wifi.ScanResults.get(i).BSSID]
        levell = [wifi.ScanResults.get(i).level]
        text += ssid[0] + " " + bssid[0] + " " + str(levell[0])
except:
    pass

try:
    wifi.ConnectWifiWpa("WifiName", "WifiPassword")
except:
    pass



#wifi.ConnectWifiWep("WifiName", "WifiPassword")
#wifi.ConnectWifiPublic("WifiName")

class Layout_For_App(FloatLayout):
    output = StringProperty()
    input = StringProperty()

    def __init__(self, **kwargs):
        super().__init__(**kwargs)
        self.ids.label_output.text = text
        self.output = text


    pass


class AndrdWifiApp(App):
    def build(self):
        return Layout_For_App()


AndrdWifiApp().run()

.KV FILE :

<Layout_For_App>:
    Label:
        text: 'Developed By Anonymous'
        pos_hint: {"x":0,"y":0.45}

    Label:
        text: 'OUTPUT' + root.output
        id: label_output
        background_color: (1, 1, 1, 1)
        size_hint: (0.451, 0.7)
        pos_hint: {"x":0.27,"y":0.17}
        valign: "middle"
        halign: "left"
        color: (0,1,0)
        canvas.before:
            Color:
                rgba: self.background_color
            Rectangle:
                size: self.size
                pos: self.pos
        border: 3, 3
    Button:
        text: 'CRACK'
        background_color: 1, 0, 0, 1
        color: 0, 1, 1
        size_hint: (0.4, 0.15)
        pos_hint: {"x":0.0199,"y":0.01}
        font_size: 30

    TextInput:
        text: 'Enter Wifi SSID'
        id: input_value
        size_hint: (0.5, 0.15)
        pos_hint: {'x':0.49,'y':0.01}
        font_size: 40

I want to get the user input from my .KV file, then store it in a VARIABLE in my .PY file

This picture explains more, and it also displays how my GUI software looks like.

Answer 1

In your Layout_For_App class you can add a method something like:

def get_ssid(self):
    self.ssid = self.ids.input_value.text  # store the input in a variable

And using your Button in the kv as an example, you can trigger that method whenever the Button is pressed:

Button:
    text: 'CRACK'
    background_color: 1, 0, 0, 1
    color: 0, 1, 1
    size_hint: (0.4, 0.15)
    pos_hint: {"x":0.0199,"y":0.01}
    font_size: 30
    on_press: root.get_ssid()  # trigger the storage of user input.