kivy - 按鈕執行功能

Question

我使用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處理文件中的數據。

我的問題是將文件路徑傳遞到下面測試函數中的打開文件命令。

這裏是我的代碼：

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() 

感謝

Answer 1

您可以在on_dropfile()如最後一行調用test()方法：

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 = '' 
    ... 

或從現有的東西已經推出例如如果從on_dropfile()功能單獨運行test()和更改文本後，你將不會改變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末放入一個單獨的變量和使用，在open()。