Music player software is a type of application software for playing computer audio files. you want to know what is import for making music player then you can know that (tkinter, pygame, and os modules) then easly create this project.

musicPlayer.py

import os
from tkinter.filedialog import askdirectory
import pygame
from tkinter import *



root = Tk()
root.title("Music Player")
root.geometry('650x450+150+150')
root.configure(bg = "light blue")
frame = Frame(root,width=600, height=900 ,background='light pink').pack()
label = Label(frame, text='Music player').place(x=300,y= 10)


listOfSong = []
pauseSong = True
index = 0
v = StringVar()
songname = ''
songlabel = Label(frame,textvariable=v, width = 50,bg = "light pink").place(x=140,y=380)

# < -------------------------------function------------------------------->
def select_song(event):
    cs = listbox.curselection()
    global index
    index = cs[0]
    pygame.mixer.music.load(listOfSong[index])
    pygame.mixer.music.play()
    updatelabel()

def next_song():
    global index
    try :
        index += 1
        pygame.mixer.music.load(listOfSong[index])
        pygame.mixer.music.play()
        updatelabel()
    except IndexError as error:
        v.set("")

def previous_song():
    try :
        global index
        index -= 1
        pygame.mixer.music.load(listOfSong[index])
        pygame.mixer.music.play()
        updatelabel()
    except IndexError as error :
         v.set("")

def pause_song():
    global pauseSong
    if pauseSong:
      pygame.mixer.music.pause()
      pauseSong = False

    else:
      pygame.mixer.music.unpause()
      pauseSong = True
    return songname
def updatelabel():
    global index
    global songname
    v.set(listOfSong[index])
    return songname
def directorychooser():
    dir = askdirectory()
    os.chdir(dir)
    for files in os.listdir(dir):
        if files.endswith(".mp3"):
            listOfSong.append(files)


    pygame.mixer.init()
    pygame.mixer.music.load(listOfSong[0])
# --------------------****************----------------------
directorychooser()
# -------------------------Listbox----------------------------
listbox = Listbox(frame,  width=40, height=20, selectmode=SINGLE)
listOfSong.reverse()
for items in listOfSong:
    listbox.insert(0, items)
listOfSong.reverse()
listbox.bind("<Double-1>",select_song)
listbox.place(x=200,y=30)


# _________________________________________Button____________________________________________________________________

nextbutton = Button(frame, text='Next' ,command =next_song).place(x=340,y=410)
previousbutton = Button(frame, text='Previous', command =previous_song).place(x=230, y=410)
pausebutton = Button(frame, text='pause', command=pause_song).place(x=290, y=410)

root.resizable(False, False)
root.mainloop()

please tell me if any my mistake in code .