Question

我正在使用Kivy示例代码从两个不同的文件中获取文件路径。我的目标是使用文件路径打开和操作文件中的数据。

我的问题是将文件路径传递给下面测试函数中的open file命令。

这是我的代码：

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()

由于

Answer 1

您可以在test()的最后一行调用on_dropfile()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 = ''
    ...

或已从现有物品中发射，例如如果您与test()函数分开运行on_dropfile()，并且在更改文本后您不会更改self.text属性：

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结尾处将其放入单独的变量中并在open()中使用它。

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1 个答案: