File_Downloader

Example Python program File_Downloader.py This program creates a PyQt GUI

Modules

• from PyQt5.QtWidgets import *
• from PyQt5.QtCore import *
• import sys
• import urllib.request

Classes

• class Downloader(QDialog):

Methods

• def init(self):
• def download(self):
• def report(self,blocknum, blocksize, totalsize):

Code

Example Python PyQt program :

from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
import sys
import urllib.request

# This sets up the project as a modified instance of the QDialog Class
class Downloader(QDialog):
    def __init__(self):
        # again, the new class needs to inherit from QDialog, so that gets initialized here
        QDialog.__init__(self)

        # this is the "window" type designator
        layout = QVBoxLayout()

        #instance variable of a URL bar
        self.url = QLineEdit()

        #instance variable of the save location bar
        self.save_location = QLineEdit()

        # instance variable of the progress bar
        self.progress = QProgressBar()
        download_button = QPushButton("Download!!")

        self.url.setPlaceholderText("URL")
        self.save_location.setPlaceholderText("File save location")

        self.progress.setValue(0)
        self.progress.setAlignment(Qt.AlignCenter)

        layout.addWidget(self.url)
        layout.addWidget(self.save_location)
        layout.addWidget(self.progress)
        layout.addWidget(download_button)

        download_button.clicked.connect(self.download)

        self.setLayout(layout)
        self.setWindowTitle("Pydownloader Bitches")
        self.setFocus()

    def download(self):
        url = self.url.text()
        save_location = self.save_location.text()
        urllib.request.urlretrieve(url,save_location,self.report)

    def report(self,blocknum, blocksize, totalsize):
        readsofar = blocknum * blocksize
        if totalsize > 0:
            percent = readsofar * 100 / totalsize
            self.progress.setValue(int(percent))

app = QApplication(sys.argv)
dl = Downloader()
dl.show()
app.exec_()

Useful Links

• Articles: https://python-commandments.org/
• PyQt: https://pythonpyqt.com/
• Tutorial: https://pythonprogramminglanguage.com/