Code for How to Build a GUI Voice Recorder App in Python Tutorial

# importing everything from tkinter
from tkinter import *
# importing the styling module ttk from tkinter
from tkinter import ttk
# importing the message boxes from tkinter
from tkinter.messagebox import showinfo, showerror, askokcancel
# this is for recording the actual voice
import sounddevice
# this is for saving the recorded file to wav file format
from scipy.io.wavfile import write
# threading will help the app's tasks run concurrently
import threading
# importing datetime from datetime to handle dates
from datetime import datetime
# this will handle time
import time
# os module will be used for renaming files
import os


# the function for closing the main window
def close_window():
    # here we are checking if the value of askokcancel is True
    if askokcancel(title='Close Voice Recorder', message='Are you sure you want to close the Voice Recorder?'):
        # this kills the window
        window.destroy()



# function for recording sound
def record_voice():
    # the try statement is for 
    try:
        # this is the frequence at which the record will happen   
        freq = 44100
        # getting the recording duration from the entry
        duration = int(duration_entry.get())
            
        # calling the recorder via the rec() function
        recording  = sounddevice.rec(duration*freq, samplerate=freq, channels=2)

        # declaring the counter
        counter = 0
        # the loop is for displaying the recording progress
        while counter < duration:
            # updating the window
            window.update()
            # this will help update the window after every 1 second
            time.sleep(1)
            # incrementing the counter by 1
            counter += 1
            # displaying the recording duration
            progress_label.config(text=str(counter))

        # this records audio for the specified duration 
        sounddevice.wait()
        # writing the audio data to recording.wav
        write('recording.wav', freq, recording)

        # looping through all the files in the current folder
        for file in os.listdir():
            # checking if the file name is recording.wav
            if file == 'recording.wav':
                # spliting the base and the extension
                base, ext = os.path.splitext(file)
                # getting current time
                current_time = datetime.now()
                # creating a new name for the recorded file
                new_name = 'recording-' + str(current_time.hour) + '.' + str(current_time.minute) + '.' + str(current_time.second) + ext
                # renaming the file
                os.rename(file, new_name)
        # display a message when recording is done  
        showinfo('Recording complete', 'Your recording is complete')
        
    # function for catching all errors   
    except:
        # display a message when an error is caught
        showerror(title='Error', message='An error occurred' \
                   '\nThe following could ' \
                    'be the causes:\n->Bad duration value\n->An empty entry field\n' \
                    'Do not leave the entry empty and make sure to enter a valid duration value')
        
# the function to run record_voice as a thread
def recording_thread():
    # creating the thread whose target is record_voice()
    t1 = threading.Thread(target=record_voice)
    # starting the thread
    t1.start()




# creates the window using Tk() fucntion
window = Tk()

# this will listen to the close window event
window.protocol('WM_DELETE_WINDOW', close_window)

# creates title for the window
window.title('Voice Recorder')

# the icon for the application, this replaces the default icon
window.iconbitmap(window, 'voice_recorder_icon.ico')

# dimensions and position of the window
window.geometry('500x450+440+180')
# makes the window non-resizable
window.resizable(height=FALSE, width=FALSE)


"""Styles for the widgets"""
# style for the label 
label_style = ttk.Style()
label_style.configure('TLabel', foreground='#000000', font=('OCR A Extended', 15))

# style for the entry
entry_style = ttk.Style()
entry_style.configure('TEntry', font=('Dotum', 15))

# style for the button
button_style = ttk.Style()
button_style.configure('TButton', foreground='#000000', font='DotumChe')


# creates the canvas for containing all the widgets
canvas = Canvas(window, width=500, height=400)
canvas.pack()

# loading the logo
logo = PhotoImage(file='recorder.png')
# creates dimensions of the logo
logo = logo.subsample(2, 2)
# adding the logo to the canvas
canvas.create_image(240, 135, image=logo)


# creating a ttk label
duration_label = ttk.Label(window, text='Enter Recording Duration in Seconds:', style='TLabel')
# creating a ttk entry
duration_entry = ttk.Entry(window, width=76, style='TEntry')

# adding the label to the canvas
canvas.create_window(235, 290, window=duration_label)
# adding the entry to the canvas
canvas.create_window(250, 315, window=duration_entry)


# creating the empty label for displaying download progress
progress_label = ttk.Label(window, text='')
# creating the button
record_button = ttk.Button(window, text='Record', style='TButton', command=recording_thread)

# adding the label to the canvas
canvas.create_window(240, 365, window=progress_label)
# adding the button to the canvas
canvas.create_window(240, 410, window=record_button)


# this will run the main window infinetly
window.mainloop()