Question

我已经创建了按钮作为驱动程序的数量，我用于循环。但创建的按钮路径是相同的，F：\，那么我应该做什么？

这是py文件：

from kivy.app import App
from kivy.uix.label import Label
from kivy.uix.button import Button
from kivy.uix.boxlayout import BoxLayout
from kivy.utils import platform

class MyApp(BoxLayout):

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.get_drivers()

    def get_drivers(self):
        if platform == 'win':
            import win32api   

            box_drivers = self.ids.box_drivers

box_drivers是包含按钮的框布局

            drivers = win32api.GetLogicalDriveStrings()
            drivers = drivers.split('\x00')[:-1]

drivers = [＆＃39; C：\＆＃39;，＆＃39; D：\＆＃39;，＆＃39; E：\＆＃39;，＆＃39; F：\＆＃39]

            for each_driver in drivers:
                button = Button()
                button.text = each_driver
                button.bind(on_press=lambda x:self.get_path(each_driver))
                box_drivers.add_widget(button)

    def get_path(self,driver_path):

        filechooser = self.ids.file_chooser
        filechooser.path = driver_path


class SrtEditor(App):

    def build(self):
        self.title = "Srt Editor"

        return MyApp()


if __name__ == "__main__":

    SrtEditor().run()

这是kv文件：

#:import os os
<MyApp>:
    orientation: 'vertical'

    BoxLayout:          
        BoxLayout:      
            id: box_drivers
            size_hint_x:20
            orientation: 'vertical' 

            Label:
                text: 'Drivers'
                size_hint_y:None
                height: '40dp'

        FileChooserIconView:        
            size_hint_x:80
            id: file_chooser
            filters: ['*.srt*']
            on_selection: pass
            path: os.getcwd()

这是应用图片：

When i press drivers, they get same path(F:)

Answer 1

您使用相同的驱动器，因为您使用的lambda函数可以查看当前帧状态

#button.bind(on_press=lambda x: self.get_path(each_driver))
#should be
button.bind(on_press=lambda x, drive=each_driver: self.get_path(drive))

read more about python function scopes to understand the issue better

Kivy，在for循环中设置按钮路径？

1 个答案: