1+ from tkinter import *
2+ from tkinter import ttk
3+ from pytube import YouTube
4+ from tkinter .messagebox import showinfo , showerror , askokcancel
5+ import threading
6+ import os
7+
8+
9+ # the function for closing the application
10+ def close_window ():
11+ # if askokcancel is True, close the window
12+ if askokcancel (title = 'Close Application' , message = 'Do you want to close MP3 downloader?' ):
13+ # this distroys the window
14+ window .destroy ()
15+
16+
17+ # the function to download the mp3 audio
18+ def download_audio ():
19+ # the try statement to excute the download the video code
20+ # getting video url from entry
21+ mp3_link = url_entry .get ()
22+ # checking if the entry and combobox is empty
23+ if mp3_link == '' :
24+ # display error message when url entry is empty
25+ showerror (title = 'Error' , message = 'Please enter the MP3 URL' )
26+ # else let's download the audio file
27+ else :
28+ # this try statement will run if the mp3 url is filled
29+ try :
30+ # this function will track the audio file download progress
31+ def on_progress (stream , chunk , bytes_remaining ):
32+ # the total size of the audio
33+ total_size = stream .filesize
34+ # this function will get the size of the audio file
35+ def get_formatted_size (total_size , factor = 1024 , suffix = 'B' ):
36+ # looping through the units
37+ for unit in ["" , "K" , "M" , "G" , "T" , "P" , "E" , "Z" ]:
38+ if total_size < factor :
39+ return f"{ total_size :.2f} { unit } { suffix }
40+ total_size /= factor
41+ # returning the formatted audio file size
42+ return f"{ total_size :.2f} { suffix }
43+
44+ # getting the formatted audio file size calling the function
45+ formatted_size = get_formatted_size (total_size )
46+ # the size downloaded after the start
47+ bytes_downloaded = total_size - bytes_remaining
48+ # the percentage downloaded after the start
49+ percentage_completed = round (bytes_downloaded / total_size * 100 )
50+ # updating the progress bar value
51+ progress_bar ['value' ] = percentage_completed
52+ # updating the empty label with the percentage value
53+ progress_label .config (text = str (percentage_completed ) + '%, File size:' + formatted_size )
54+ # updating the main window of the app
55+ window .update ()
56+
57+ # creating the YouTube object and passing the the on_progress function
58+ audio = YouTube (mp3_link , on_progress_callback = on_progress )
59+ # extracting and downloading the audio file
60+ output = audio .streams .get_audio_only ().download ()
61+ # this splits the audio file, the base and the extension
62+ base , ext = os .path .splitext (output )
63+ # this converts the audio file to mp3 file
64+ new_file = base + '.mp3'
65+ # this renames the mp3 file
66+ os .rename (output , new_file )
67+ # popup for dispalying the mp3 downlaoded success message
68+ showinfo (title = 'Download Complete' , message = 'MP3 has been downloaded successfully.' )
69+ # ressetting the progress bar and the progress label
70+ progress_label .config (text = '' )
71+ progress_bar ['value' ] = 0
72+ # the except will run when an expected error occurs during downloading
73+ except :
74+ showerror (title = 'Download Error' , message = 'An error occurred while trying to ' \
75+ 'download the MP3\n The following could ' \
76+ 'be the causes:\n ->Invalid link\n ->No internet connection\n ' \
77+ 'Make sure you have stable internet connection and the MP3 link is valid' )
78+ # ressetting the progress bar and the progress label
79+ progress_label .config (text = '' )
80+ progress_bar ['value' ] = 0
81+
82+
83+
84+ # the function to run the download_audio function as a thread
85+ def downloadThread ():
86+ t1 = threading .Thread (target = download_audio )
87+ t1 .start ()
88+
89+
90+ # creates the window using Tk() fucntion
91+ window = Tk ()
92+
93+ # this will listen to the close window event
94+ window .protocol ('WM_DELETE_WINDOW' , close_window )
95+
96+ # creates title for the window
97+ window .title ('MP3 Downloader' )
98+
99+ # the icon for the application, this will replace the default tkinter icon
100+ window .iconbitmap (window , 'icon.ico' )
101+
102+ # dimensions and position of the window
103+ window .geometry ('500x400+430+180' )
104+ # makes the window non-resizable
105+ window .resizable (height = FALSE , width = FALSE )
106+
107+ # creates the canvas for containing all the widgets
108+ canvas = Canvas (window , width = 500 , height = 400 )
109+ canvas .pack ()
110+
111+ """Styles for the widgets"""
112+ # style for the label
113+ label_style = ttk .Style ()
114+ label_style .configure ('TLabel' , foreground = '#000000' , font = ('OCR A Extended' , 15 ))
115+
116+ # style for the entry
117+ entry_style = ttk .Style ()
118+ entry_style .configure ('TEntry' , font = ('Dotum' , 15 ))
119+
120+ # style for the button
121+ button_style = ttk .Style ()
122+ button_style .configure ('TButton' , foreground = '#000000' , font = 'DotumChe' )
123+
124+ # loading the MP3 logo
125+ logo = PhotoImage (file = 'mp3_icon.png' )
126+ # creates dimensions for the logo
127+ logo = logo .subsample (2 , 2 )
128+ # adding the logo to the canvas
129+ canvas .create_image (180 , 80 , image = logo )
130+
131+ # the Downloader label just next to the logo
132+ mp3_label = ttk .Label (window , text = 'Downloader' , style = 'TLabel' )
133+ canvas .create_window (340 , 125 , window = mp3_label )
134+
135+ # creating a ttk label
136+ url_label = ttk .Label (window , text = 'Enter MP3 URL:' , style = 'TLabel' )
137+ # creating a ttk entry
138+ url_entry = ttk .Entry (window , width = 72 , style = 'TEntry' )
139+
140+ # adding the label to the canvas
141+ canvas .create_window (114 , 200 , window = url_label )
142+ # adding the entry to the canvas
143+ canvas .create_window (250 , 230 , window = url_entry )
144+
145+ # creating the empty label for displaying download progress
146+ progress_label = Label (window , text = '' )
147+ # adding the label to the canvas
148+ canvas .create_window (240 , 280 , window = progress_label )
149+
150+ # creating a progress bar to display progress
151+ progress_bar = ttk .Progressbar (window , orient = HORIZONTAL , length = 450 , mode = 'determinate' )
152+ # adding the progress bar to the canvas
153+ canvas .create_window (250 , 300 , window = progress_bar )
154+
155+ # creating the button
156+ download_button = ttk .Button (window , text = 'Download MP3' , style = 'TButton' , command = downloadThread )
157+ # adding the button to the canvas
158+ canvas .create_window (240 , 330 , window = download_button )
159+
160+ # this runs the app infinitely
161+ window .mainloop ()
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