Python 巨蟒基维。我的程序应该附加文本文件，但不是

文本文件应如下所示：

e、 g

此函数的作用是将滑块的新值附加到文本文件中，或更改滑块的新值

滑块有一些名称，每个名称可以有许多值，这些值由slider.value和当前日期组成。如果今天不是最后一个值的日期，那么我们将附加该文件

如果今天与最后一个值的日期相同，则应该更改它（我还没有这样做，但这不是问题，我会在解决此问题后自己做）

这是完整的Python文件和Kivy文件，除了def save_值外，其他什么都不重要。其他一切都只是为了让程序为你工作

蟒蛇

from kivy.app import App

import time
import datetime


from kivy.uix.button import Button
from kivy.uix.label import Label
from kivy.lang import Builder
from kivy.uix.slider import Slider
from kivy.uix.widget import Widget
from kivy.uix.textinput import TextInput

from kivy.uix.boxlayout import BoxLayout
from kivy.uix.anchorlayout import AnchorLayout

from kivy.uix.screenmanager import ScreenManager, Screen, FadeTransition

from kivy.config import Config

screen_width = 450
screen_height = 800

Config.set("graphics", "resizable","1")
Config.set("graphics", "width", screen_width)

Config.set("graphics", "height", screen_height)

languages = ["Reading","Writing","Running","Climbing"]
spawned_List = ["False"]


class MenuScreen(Screen):
    pass

class JobChoiceScreen(Screen):
    def changing_screen(self, instance, *args):
        self.manager.current= "sliderScreen"

        screenSlider = self.manager.get_screen('sliderScreen')
        text = str(instance.text)

        screenSlider.changing_label(text)

    def on_pre_enter(self, *args):
        if spawned_List[0] == "False":
            for x in range(0,len(languages)):
                word = languages[x]
                word = str(word)
                btn = Button(text = word, size_hint=(None, None), size = (140,70),
                font_size = 18, bold = True, color = [0,1,1,1], background_color = (.156, .172, .24, 0.7),
                on_release = self.changing_screen)

                self.ids.container.add_widget(btn)

                spawned_List[0] = "True"

            self.ids.boxLayBottom.add_widget(Widget(size_hint=(1, .4)))

            self.ids.datesContainer.add_widget(Button(text = "Day back", size_hint=(.28, 1), font_size = 18, bold = True, color = [0,1,1,1], background_color = (.176, .192, .44, 0.7)))
            self.ids.datesContainer.add_widget(Widget(size_hint=(.44, 1)))
            self.ids.datesContainer.add_widget(Button(text = "Day forward", size_hint=(.28, 1), font_size = 18, bold = True, color = [0,1,1,1], background_color = (.176, .192, .44, 0.7)))

class SliderScreen(Screen):


    def save_values(self, *args, **kwargs):
        date = (datetime.datetime.now().strftime("%y-%m-%d"))
        written = (str(self.ids.my_slider.value)+ "/" + date + " ")
        print("started save_values")

        with open('values.txt', 'r') as fileValues:
            lines = fileValues.readlines()
            print("opened the file")

            with open('values.txt', 'a') as fileValues:
                for i, line in enumerate(lines):
                    if line.startswith(self.ids.my_label.text) and line.find(date) == -1:
                        line = line + ((self.ids.my_label.text) + " " + written)
                        print(line)

                        if not line.startswith(self.ids.my_label.text) and line.find(date) == -1:
                            line = (" " + written)
                            print(line)
                            print("hello bill")

    def changing_label(self, text):
        self.ids.my_label.text = text


class ScreenManagement(ScreenManager):
    pass

presentation = Builder.load_file("manager.kv")

class MainApp(App):
    def build(self):
        return presentation

if __name__ == "__main__":
    MainApp().run()

基维

---

我发现您的代码有两个问题：

在

save_values（）

方法中，您将以相同的名称，但不同的模式同时打开

values.txt

文件两次。我认为您需要使用open块取消第二个

，使用open

语句删除第二个

，并将第一个
使用open
语句中的模式修改为
r+
。因此，您的代码应该如下所示：

with open('values.txt', 'r+') as fileValues:
    lines = fileValues.readlines()
    print("opened the file")

    for i, line in enumerate(lines):

您从不调用任何

write

例程，因此不会写入任何内容。当您想在

values.txt

中追加行时，需要调用

fileValues.write（）

或

fileValues.writelines（）

我没有看过你的代码逻辑，所以我不会对此发表评论

ScreenManagement:
    #transition: FadeTransition()
    MenuScreen:
    JobChoiceScreen:
    SliderScreen:

<MenuScreen>:
    canvas:
        Rectangle:
            source:"background.jpg"
            pos: self.pos
            size: self.size
    name: "menu"

    BoxLayout:
        padding: [10,10,10,10]
        orientation: "vertical"
        Widget:
            size_hint: [1,0.2]

        BoxLayout:

            Button:
                bold: True
                color: [0,1,1,1]
                on_release: app.root.current = "list_of_jobs"
                text: "Change"
                size_hint: [0.28,1]
                font_size: 20
                background_color: (.156, .172, .24, 0.7)

            Widget:
                size_hint: [0.44,1]

            Button:
                bold: True
                color: [.5,0, .8, .7]
                text: "View \n Progress"
                size_hint: [0.28,1]         
                font_size: 20
                halign: "center" 
                valign: "center"
                background_color: (.156, .172, .24, 0.7)
                on_release: app.root.current = "sliderScreen"

        Widget:
            size_hint: [1,0.2]


<JobChoiceScreen>:
    canvas:
        Rectangle:
            source:"background.jpg"
            pos: self.pos
            size: self.size

    name: "list_of_jobs"

    BoxLayout:
        orientation: "vertical"
        padding: [10,10,10,10]
        BoxLayout:
            orientation: "vertical"
            id: boxLayBottom
            size_hint: (1,.1)

            BoxLayout:
                id: datesContainer
                orientation: "horizontal"
                size_hint: (1,.6)
        AnchorLayout:
            anchor_x: "center"
            acnhor_y: "top"
            size_hint: (1,.8)

            GridLayout:
                id: container
                cols: 3
                spacing: 5

        BoxLayout:
            orientation: "vertical"
            id: boxContainer
            size_hint: (1,.1)

            Button:
                text: "Back to Menu" 
                on_release: app.root.current = "menu"
                bold: True
                color: [0,1,1,1]
                background_color: (.176, .192, .44, 0.7)

<SliderScreen>:
    canvas:
        Rectangle:
            source:"background.jpg"
            pos: self.pos
            size: self.size

    name: "sliderScreen"

    BoxLayout:
        padding: [10,10,10,10]
        orientation: "vertical"
        id: my_label_container

        Slider: 
            id: my_slider
            min: 0
            max: 100
            value: 0
            orientation: "vertical"
            size_hint: [1, 0.7]
            step: 1

        Label: 
            id: my_label
            size_hint: [1, 0.2]
            bold: True
            font_size: 40
            text: ""

        Button:
            size_hint: [1, 0.1]
            bold: True
            on_release: app.root.current = "menu"
            text : "Back Home"
            font_size: 20
            halign: "center" 
            valign: "center"
            background_color: (.156, .172, .24, 0.7)
            on_press: root.save_values()

def save_values(self, *args, **kwargs):
    date = (datetime.datetime.now().strftime("%y-%m-%d"))
    written = (str(self.ids.my_slider.value)+ "/" + date + " ")
    print("started save_values")

    with open('values.txt', 'r') as fileValues:
        lines = fileValues.readlines()
        print("opened the file")

        with open('values.txt', 'a') as fileValues:
            for i, line in enumerate(lines):
                if line.startswith(self.ids.my_label.text) and line.find(date) == -1:
                    line = line + ((self.ids.my_label.text) + " " + written)
                    print(line)

                    if not line.startswith(self.ids.my_label.text) and line.find(date) == -1:
                        line = (" " + written)
                        print(line)
                        print("hello bill")

with open('values.txt', 'r+') as fileValues:
    lines = fileValues.readlines()
    print("opened the file")

    for i, line in enumerate(lines):