如何在 Kivy (Python3) 中动态创建多个函数？

如何解决如何在 Kivy (Python3) 中动态创建多个函数？

情况

我正在创建一个会议查找器应用程序，它将搜索 JSON 文件并返回多个会议字典的列表。我想为每个会议创建按钮，以便我可以了解有关会议的更多信息或加入会议。由于我需要查询会议列表，所以我不知道会有多少个会议按钮。我需要动态生成和绑定这些按钮。

Python 代码

只添加导致问题的那部分代码。

class Meetingdisplayer(Screen):
    def __init__(self,back,info,**kwargs):
        super().__init__(**kwargs)
        self.back = back
        self.info = info   # this is the meetings list which contains multiple meeting dictionaries.

        self.headings = [] # this will contain the text of the buttons
        for meeting in self.info:
            meeting_subject = meeting["meeting_subject"]
            meeting_organizer = meeting["meeting_organizer"]
            time = meeting["time"]
            heading = f"{meeting_subject} | {meeting_organizer} | {time}"
            self.headings.append([heading,None])
            
        
        self.scroller = ScrollView()
        self.scroller.pos_hint = {"x": 0.1,"top": 0.75}
        self.scroller.size_hint = (0.8,0.63)
        
        self.info_grid = GridLayout()
        self.info_grid.cols = 1
        if len(self.headings) > 20:
            self.info_grid.size_hint = 1,2
        elif len(self.headings) > 10:
            self.info_grid.size_hint = 1,1.4
        elif len(self.headings) > 5: 
            self.info_grid.size_hint = 1,0.8
        else:
            self.info_grid.size_hint = 1,0.35
        
        i = -1
        for heading in self.headings:
            i += 1
            heading[1] = Button(text = heading[0],font_size = 15,color = (1,1,1),background_color = (0/255,153/255,204/255,on_release = lambda x: self.find_function(i))
            self.info_grid.add_widget(heading[1])

        self.scroller.add_widget(self.info_grid)
        self.add_widget(self.scroller)
     
        
    def find_function(self,i):
        sm.add_widget(Meetinginformation(self.info,name = "Meetinginformation"))
        Meetinginformation_screen = sm.get_screen('Meetinginformation')
        setattr(Meetinginformation_screen,"index",i)
        sm.transition = SlideTransition(direction = "left")
        sm.current = "Meetinginformation"


class Meetinginformation(Screen):
    def __init__(self,meeting_list,**kwargs):
        super().__init__(**kwargs)
        self.meeting_list  = meeting_list

    def on_pre_enter(self):
        print(self.index)
        meeting = self.meeting_list[self.index]        

        self.info_grid = GridLayout()
        self.info_grid.cols = 2
        self.info_grid.size_hint = 0.9,0.4
        self.info_grid.pos_hint = {"x": 0.05,"top": 0.67}
        self.category_label = Button(text = "Category:",font_size = 14,1))
        self.info_grid.add_widget(self.category_label)
        self.category_value = Label(text = meeting["category"],color = (0,1))
        self.info_grid.add_widget(self.category_value)
        self.time_label = Button(text = "Time:",1))
        self.info_grid.add_widget(self.time_label)
        self.time_value = Label(text = meeting["time"],1))
        self.info_grid.add_widget(self.time_value)
        self.subject_label = Button(text = "Subject:",1))
        self.info_grid.add_widget(self.subject_label)
        self.subject_value = Label(text = meeting["meeting_subject"],1))
        self.info_grid.add_widget(self.subject_value)
        self.organizer_label = Button(text = "Organizer:",1))
        self.info_grid.add_widget(self.organizer_label)
        self.organizer_value = Label(text = meeting["meeting_organizer"],1))
        self.info_grid.add_widget(self.organizer_value)
        self.meeting_id_label = Button(text = "Meeting ID:",1))
        self.info_grid.add_widget(self.meeting_id_label)
        self.meeting_id_value = Label(text = str(meeting["meeting_id"]),1))
        self.info_grid.add_widget(self.meeting_id_value)
        self.passcode_label = Button(text = str("Meeting Passcode:"),1))
        self.info_grid.add_widget(self.passcode_label)
        self.passcode_value = Label(text = meeting["passcode"],1))
        self.info_grid.add_widget(self.passcode_value)
        self.activation_status_label = Button(text = "Activation Status:",1))
        self.info_grid.add_widget(self.activation_status_label)
        self.activation_status_value = Label(text = str(meeting["active"]),1))
        self.info_grid.add_widget(self.activation_status_value)
        self.add_widget(self.info_grid)

但问题是当我点击一个按钮时，我只能得到我添加的最后一个按钮小部件。 我的意思是作为索引属性的 i 变量被设置为一个固定数字 [最后一个按钮的索引]，它无法识别按下了哪个按钮。

一些可以帮助的图片

all buttons are here

after pressing the first button

after pressing the second button

问题

如何动态绑定按钮和函数，让每次按下按钮都能得到那个按钮的准确索引或显示准确信息？

解决方法

尝试改变：

heading[1] = Button(text = heading[0],font_size = 15,color = (1,1,1),background_color = (0/255,153/255,204/255,on_release = lambda x: self.find_function(i))

到：

heading[1] = Button(text = heading[0],on_release = lambda x,j=i: self.find_function(j))

lambda 函数在调用 lambda 时（通过按下按钮）计算 i。更改为 lambda x,j=i: self.find_function(j) 会在创建 `lambda 时强制对 i 求值。