Tkinter-创建动态按钮

Question

我正在尝试构建音乐播放器。现在，这真的很简单，我在尝试进行某种排队时陷入困境。

我决定要使列表中的每首歌曲都“可点击”，以便以其路径作为参数来调用另一个函数。我试图创建动态按钮，每次单击Search都会创建一个新按钮，但多次尝试不同的方法均失败。目前，我被困在：

def searchmusic(self):
    self.newmusicpath = filedialog.askopenfilename(initialdir="/", title = "Szukajka", filetypes = (("mp3","*.mp3"),("all","*.*")))
    #self.playmusic(self.newmusicpath)
    self.music_dict["song" + str(self.music_on_list_number)] = self.newmusicpath
    print(self.music_dict)

    locals()['song{}partial'.format(self.music_on_list_number)] = print("TEST DONE")
    locals()['song{}'.format(self.music_on_list_number)] = tk.Button(canvas, text = self.newmusicpath, command = exec('song{}partial'.format(self.music_on_list_number)))

    exec('song{}.pack()'.format(self.music_on_list_number))
    self.music_on_list_number += 1

在我搜索新歌曲而不是单击该新歌曲按钮后，locals()['song{}partial'.format(self.music_on_list_number)] = print("TEST DONE")行正在执行。

其余代码：

import pygame
import tkinter as tk
import os
from tkinter import filedialog, Text
import functools

pygame.mixer.init()

class music:
    def __init__(self):
        self.music_playing  = False
        self.music_pause = False
        self.currently_playing_label = "Nyan Cat"
        self.currently_playing = r"C:/Users/Happy\Desktop/Raspbian python/nyan.mp3"
        self.music_dict = {}
        self.CurrentSongLabel = tk.Label(frame, text = "None", bg = 'green')
        self.CurrentSongLabel.pack()
        self.music_on_list_number = 0

    def volumecontrol(self, volumeslider):
        pygame.mixer.music.set_volume(int(volumeslider)/100)

        #Start/Pause button
    def playbutton(self):
        if self.music_playing == False:
            self.music_playing = True
            self.playmusic(self.currently_playing)
        elif self.music_pause == False:
            pygame.mixer.music.pause()
            self.music_pause = True
        elif self.music_pause == True:
            pygame.mixer.music.unpause()
            self.music_pause = False

        #Music play
    def playmusic(self, pathtonewmusic):
        if pygame.mixer.music.get_busy() != -1:
            pygame.mixer.music.stop()
        self.currently_playing = pathtonewmusic
        pygame.mixer.music.load(self.currently_playing)
        pygame.mixer.music.play()
        self.currentlyplayinglabel()

        #Label change
    def currentlyplayinglabel(self):
        if self.CurrentSongLabel:
            self.CurrentSongLabel.destroy()
        self.currently_playing_as_list = self.currently_playing.split("/")
        self.currently_playing_label = self.currently_playing_as_list[-1]
        self.CurrentSongLabel = tk.Label(frame, text = self.currently_playing_label, bg = 'green', fg = 'lightblue')
        self.CurrentSongLabel.pack()

        #Music search
    def searchmusic(self):
        self.newmusicpath = filedialog.askopenfilename(initialdir="/", title = "Szukajka", filetypes = (("mp3","*.mp3"),("all","*.*")))
        #self.playmusic(self.newmusicpath)
        self.music_dict["song" + str(self.music_on_list_number)] = self.newmusicpath
        print(self.music_dict)

        locals()['song{}partial'.format(self.music_on_list_number)] = print("TEST DONE")
        locals()['song{}'.format(self.music_on_list_number)] = tk.Button(canvas, text = self.newmusicpath, command = exec('song{}partial'.format(self.music_on_list_number)))

        exec('song{}.pack()'.format(self.music_on_list_number))
        self.music_on_list_number += 1

#Creating windows
root = tk.Tk()

canvas = tk.Canvas(root, width = 300, height = 100, bg = 'red')
canvas.grid(row = 5, columnspan = 3)

frame = tk.Frame(root, bg = 'green')
frame.grid(row = 0, column = 0, columnspan = 4)
LabelPlayingCurrently = tk.Label(frame, text = "CURRENTLY PLAYING:", bg = 'green', fg = 'lightblue')
LabelPlayingCurrently.pack()

#Init music function
music_inited = music()

#Music control buttons
play = tk.Button(root, text = 'Play/Pause', fg='white', padx = 15, pady = 30, bg = "red", command = music_inited.playbutton)
play.grid(row = 3, column = 0, rowspan = 2)

nextsong = tk.Button(root, text = 'Nastepna', fg='white', bg = "red", pady = 10, padx = 6)
nextsong.grid(row = 3, column = 1)

previoussong = tk.Button(root, text = 'Poprzednia', fg='white', bg = "red", pady = 10)
previoussong.grid(row = 4, column = 1)

volume = tk.Scale(root, label = "VOLUME", from_ = 100, to = 0, command=music_inited.volumecontrol)
volume.set(5)
volume.grid(row = 3, column = 2, rowspan = 2)

#Music search button
searchbutton = tk.Button(root, text = 'Search', fg='white', bg = "red", command = music_inited.searchmusic)
searchbutton.grid(row = 8, column = 0, columnspan = 3)


root.mainloop()

Answer 1

行：

locals()['song{}partial'.format(self.music_on_list_number)] = print("TEST DONE")

将执行print（“ TEST DONE”），然后将None赋给locals（）中的变量

您的意思是：

locals()['song{}partial'.format(self.music_on_list_number)] = lambda : print("TEST DONE")

Answer 2

我已经做到了。我不是自己创建所有按钮，而是使用tkinter的列表框。可悲的是，使用lambda对我没有用。与局部变量相同。