Qt, classes and threads

Question

-ordi- 6 Junior Poster in Training

14 Years Ago

# -*- coding: utf-8 -*-

from PyQt4 import QtGui 
from PyQt4.QtCore import *
import sys
import os

class VideosToMp3(QtGui.QWidget):
  def __init__(self, parent = None):
    super(VideosToMp3, self).__init__(parent)
    ''' Labels and GUI ''' 
    extension = QtGui.QWidget()
    download_label = QtGui.QLabel("Enter YouTube video URL:")
    self.download_line_edit = QtGui.QLineEdit()
    file_label = QtGui.QLabel("Enter file name (optional):")
    self.file_line_edit = QtGui.QLineEdit()  
    mp3_filename_label = QtGui.QLabel("MP3 file name:")
    self.filename_line_edit = QtGui.QLineEdit()
    download_button = QtGui.QPushButton("Download in URL")
    download_file_button = QtGui.QPushButton("Download in file")  
    cancel_button = QtGui.QPushButton("Cancel")  
    spacer = QtGui.QSpacerItem(10, 20, QtGui.QSizePolicy.Minimum, QtGui.QSizePolicy.Expanding)
    gridLayout = QtGui.QGridLayout()
    gridLayout.addWidget(download_label, 0, 0)
    gridLayout.addWidget(self.download_line_edit, 0, 1)
    gridLayout.addWidget(mp3_filename_label, 1, 0)
    gridLayout.addWidget(self.filename_line_edit, 1, 1)
    gridLayout.addWidget(file_label, 2, 0)
    gridLayout.addWidget(self.file_line_edit, 2, 1)  
    gridLayout.addWidget(download_button, 3, 0)  
    gridLayout.addWidget(cancel_button, 3, 1)  
    gridLayout.addWidget(download_file_button, 4, 0) 
    gridLayout.addItem(spacer)

    mainLayout = QtGui.QVBoxLayout()
    mainLayout.setSizeConstraint(QtGui.QLayout.SetFixedSize)
    mainLayout.addLayout(gridLayout)
    self.setLayout(mainLayout)
    
    ''' Connect '''
    #self.connect(download_button, SIGNAL('clicked()'), self.download_video)
    self.connect(cancel_button, SIGNAL('clicked()'), self.close)  
    self.connect(download_file_button, SIGNAL('clicked()'), self.download_videos)

class Download_in_url():
  def __init__(self):
    def download_video_in_url(url):
      os.system('python youtube-dl' + url)  

class Download_in_file():
  def __init__(self):
    print "Creating folder 'music'"
    os.system('mkdir -p music')
    download_videos()

    def check_file_format(file_name): 
	if file_name.endswith('.flv'):
	    return str(file_name)
	else:
	    return str(file_name + '.flv')

    def download_videos(): 
	list_videos = []
	list_music = []
	try:
	  input_file = open('videos.txt')
	  for line in input_file:
	      (name, address) = line.split('||') 	
	      name = name.replace(' ', '_')  		
	      if name.startswith('[olemas]') or os.path.exists(str(os.getcwd()) + '/music/' + name.rstrip('.flv') + '.mp3'):
		  print name, "is exists! Ignoring!"
	      else:
		  check_name = check_file_format(name)
		  download = 'python youtube-dl -o ' + check_name + ' ' + address
		  convert = 'ffmpeg -i ' + check_name + ' -y -f mp3 -vn -acodec copy ' + check_name.rstrip('.flv') + '.mp3'
		  list_videos.append(download)
		  list_music.append(convert)
	except IOError:
	    pass

	print "Downloading all videos"
	for download_videos in list_videos:
	    os.system(download_videos)

	print "Creating all mp3's"
	for create_music in list_music:
	    os.system(create_music)

print "Moving music to directory 'music'"
os.system('mv *.mp3 ' + os.getcwd() + '/music')

print "Removing unused videos"
os.system('rm *.flv')     
    
def main():
  aplication = QtGui.QApplication(sys.argv)
  window = VideosToMp3()
  window.setWindowTitle("YouTube To MP3 Downloader")
     
  window.show()
  program = aplication.exec_()
  sys.exit(program)    

if __name__ == "__main__":
  main()

Moving music to directory 'music'
mv: stat `*.mp3' ei õnnestu: No such file or directory
Removing unused videos
rm: `*.flv' ei saa kustutada: No such file or directory
Traceback (most recent call last):
File "DownloadYouTubeVideos.py", line 105, in <module>
main()
File "DownloadYouTubeVideos.py", line 97, in main
window = VideosToMp3()
File "DownloadYouTubeVideos.py", line 43, in __init__
self.connect(download_file_button, SIGNAL('clicked()'), self.download_videos)
AttributeError: 'VideosToMp3' object has no attribute 'download_videos'

How to use the classes and Qt threads, because the user interface is not running properly at the time of when download videos and converts them to mp3.

oop python qt

3 Contributors
5 Replies
637 Views
5 Years Discussion Span
Latest Post 8 Years Ago Latest Post by Ha

tzushky 0 Junior Poster in Training

14 Years Ago

Hi,

I think that before you go into threads you should maybe explain your idea in a few lines.
For now, the error you receive is due to the fact that the slot you've connected to the download_file_button is not a method of the VideosToMp3 class, but of Download_in_File class. That will not work. Also, this Download_in_File clas is never instantiated.

Please explain a bit more so we can help you dig out the solution, and give advice for the way you should implement a thread if it proves you need one.

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-ordi- 6 Junior Poster in Training · Answer 1 · 2010-06-21T21:04:50+00:00

# -*- coding: utf-8 -*-

from PyQt4 import QtGui, QtCore
from PyQt4.QtCore import *  
import sys
import os

class Download_Videos_In_File(QtCore.QThread):
  def __init__(self):
    QtCore.QThread.__init__(self)
  
  def run(self):

  #  def download_video_in_url(self):
  #  os.system('python youtube-dl ' + str(self.download_url_button.text()))  

    print "Creating folder 'music'"
    os.system('mkdir -p music')
    self.download_videos()

  def download_videos(self): 
    list_videos = []
    list_music = []
    try:
      input_file = open('videos.txt')
      for line in input_file:
	(name, address) = line.split('||') 	
	name = name.replace(' ', '_')  		
	if name.startswith('[olemas]') or os.path.exists(str(os.getcwd()) + '/music/' + name.rstrip('.flv') + '.mp3'):
	  print name, "is exists! Ignoring!"
	else:
	  check_name = self.check_file_format(name)
	  download = 'python youtube-dl -o ' + check_name + ' ' + address
	  convert = 'ffmpeg -i ' + check_name + ' -y -f mp3 -vn -acodec copy ' + check_name.rstrip('.flv') + '.mp3'
	  list_videos.append(download)
	  list_music.append(convert)
    except IOError:
      pass
      
    print "Downloading all videos"
    for download_videos in list_videos:
      os.system(download_videos)

    print "Creating all mp3's"
    for create_music in list_music:
      os.system(create_music)

  def check_file_format(self, file_name): 
    if file_name.endswith('.flv'):
      return str(file_name)
    else:
      return str(file_name + '.flv')

class UI_Widget(QtGui.QWidget):
  def __init__(self, parent = None):
    super(UI_Widget, self).__init__(parent)
    ''' 
    Labels, line edits and GUI 
    ''' 
    extension = QtGui.QWidget()
    download_url_label = QtGui.QLabel("Enter YouTube video URL:")
    self.download_url_line_edit = QtGui.QLineEdit()

    download_file_label = QtGui.QLabel("Enter file name (optional):")
    self.download_file_line_edit = QtGui.QLineEdit()
  
    mp3_filename_label = QtGui.QLabel("MP3 file name:")
    self.mp3_line_edit = QtGui.QLineEdit()
    '''
    Buttons
    '''
    self.download_url_button = QtGui.QPushButton("Download in URL")
    self.download_file_button = QtGui.QPushButton("Download in file")  
    self.cancel_button = QtGui.QPushButton("Cancel")  

    spacer = QtGui.QSpacerItem(10, 20, QtGui.QSizePolicy.Minimum, QtGui.QSizePolicy.Expanding)
    ''' 
    Layout
    '''
    gridLayout = QtGui.QGridLayout()
    gridLayout.addWidget(download_url_label, 0, 0)
    gridLayout.addWidget(self.download_url_line_edit, 0, 1)

    gridLayout.addWidget(mp3_filename_label, 1, 0)
    gridLayout.addWidget(self.mp3_line_edit, 1, 1)

    gridLayout.addWidget(download_file_label, 2, 0)
    gridLayout.addWidget(self.download_file_line_edit, 2, 1)
  
    gridLayout.addWidget(self.download_url_button, 3, 0)  
    gridLayout.addWidget(self.cancel_button, 3, 1)  
    gridLayout.addWidget(self.download_file_button, 4, 0)
 
    gridLayout.addItem(spacer)
    mainLayout = QtGui.QVBoxLayout()
    mainLayout.setSizeConstraint(QtGui.QLayout.SetFixedSize)
    mainLayout.addLayout(gridLayout)
    self.setLayout(mainLayout)
    '''
    Threads
    '''
    self.download = Download_Videos_In_File()
    ''' 
    Connect 
    '''
    self.connect(self.cancel_button, SIGNAL('clicked()'), self.close)  
    self.connect(self.download_file_button, SIGNAL('clicked()'), self.download.start)
  
def main():
  aplication = QtGui.QApplication(sys.argv)
  window = UI_Widget()
  window.setWindowTitle("YouTube To MP3 Downloader")
  window.show()
  program = aplication.exec_()
  
  try:
    print "Moving music to directory 'music'"
    os.system('mv *.mp3 ' + os.getcwd() + '/music')
    print "Removing unused videos"
    os.system('rm *.flv')
  except:
    pass

  sys.exit(program)    

if __name__ == "__main__":
  main()

My goal is that the user enters either a URL or file (where is the video address and name of the file), then my program download videos and converts them mp3, however, as the interface to be "usable".

-ordi- 6 Junior Poster in Training · Answer 2 · 2010-06-26T22:10:12+00:00

How to split?

File.txt:

video and autor name  http://www.daniweb.com/forums/thread291506.html

(name, address) = line.split(' ')

name = name.replace(' ', '_')

name = 'video_and_autor_name'
address = 'http://www.daniweb.com/forums/thread291506.html'

-ordi- 6 Junior Poster in Training · Answer 3 · 2010-06-27T20:27:07+00:00

How to split?

File.txt:

video and autor name  http://www.daniweb.com/forums/thread291506.html

(name, address) = line.split(' ')

name = name.replace(' ', '_')

name = 'video_and_autor_name'
address = 'http://www.daniweb.com/forums/thread291506.html'

How to make this???

Ha 0 Newbie Poster · Answer 4 · 2016-03-18T06:15:35+00:00

https://drive.google.com/drive/my-drive

Just use this