kivy-按鈕執行功能

Question

我正在使用Kivy示例代碼從兩個不同的文件獲取文件路徑。 我的目標是使用文件路徑打開和操作文件中的數據。

我的問題是將文件路徑傳遞到下面的測試功能中的打開文件命令中。

這是我的代碼：

from kivy.app import App    
from kivy.uix.button import Button    
from kivy.core.window import Window    
from kivy.uix.boxlayout import BoxLayout    
from kivy.uix.label import Label    

import re    
import pandas as pd

class DropFile(Button):

        def __init__(self, **kwargs):
            super(DropFile, self).__init__(**kwargs)
            # get app instance to add function from widget
            app = App.get_running_app()
            # add function to the list
            app.drops.append(self.on_dropfile)

        def on_dropfile(self, widget, path):
            # a function catching a dropped file
            # if it's dropped in the widget's area
            if self.collide_point(*Window.mouse_pos):
                self.text = path

        def test(self):
            minimum_wage = open(**FILE PATH HERE**)
            LinesToString = ''
            for line in minimum_wage:
                LinesToString += line
            patFinder = re.compile('\d{5}\s+\d{5,9}')
            findPat = re.findall(patFinder, LinesToString)
            empno_list = []
            pattern = '(\d{5})\s+(\d{5})'
            for string in findPat:
                match = re.search(pattern, string)
                empno = match.group(2)
                empno_list.append(empno)
            MinimumWage = pd.DataFrame({'EMPNO': empno_list})
            MinimumWage.set_index('EMPNO')
            print MinimumWage.head()
            print MinimumWage.shape

class DropApp(App):

        def build(self):
            # set an empty list that will be later populated
            # with functions from widgets themselves
            self.drops = []
            # bind handling function to 'on_dropfile'
            Window.bind(on_dropfile=self.handledrops)
            box = BoxLayout(orientation='vertical')
            top_label = Label(text='Data manipulation', font_size=45)
            box.add_widget(top_label)

            run_button = Button(text='Run', size_hint=(1, 0.5))
            run_button.bind(on_press=DropFile.test)
            box.add_widget(run_button)

            two_buttons = BoxLayout(orientation='horizontal')
            dropleft = DropFile(text='Drag & Drop File here')
            # dropright = DropFile(text='right')
            two_buttons.add_widget(dropleft)
            # two_buttons.add_widget(dropright)
            box.add_widget(two_buttons)
            return box

        def handledrops(self, *args):
           # this will execute each function from list with arguments from
            # Window.on_dropfile
            #
            # make sure `Window.on_dropfile` works on your system first,
            # otherwise the example won't work at all
            for func in self.drops:
                func(*args)

DropApp().run()

謝謝

Answer 1

您可以在on_dropfile()的最后一行調用test()方法，例如：

def on_dropfile(self, widget, path):
    # a function catching a dropped file
    # if it's dropped in the widget's area
    if self.collide_point(*Window.mouse_pos):
        self.text = path
        self.test(path)

def test(self, path):
    minimum_wage = open(path)
    LinesToString = ''
    ...

或已經從現有事物啟動，例如，如果您與on_dropfile()函數分開運行test() ，並且在更改文本后不會更改self.text屬性：

def on_dropfile(self, widget, path):
    # a function catching a dropped file
    # if it's dropped in the widget's area
    if self.collide_point(*Window.mouse_pos):
        self.text = path  # path is assigned to self.text <--

def test(self):
    minimum_wage = open(self.text)  # <-- and you can use it
    LinesToString = ''
    ...

或者在on_dropfile的末尾將其放入一個單獨的變量中，並在open()使用它。