stackoverflow_question

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

Modules

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

Classes

class Downloader(QDialog):

Methods

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

Code

Example Python PyQt program :

import sys
import urllib.request

from PyQt5.QtCore import *
from PyQt5.QtWidgets import *


class Downloader(QDialog):
    def __init__(self):
        QDialog.__init__(self)
        layout = QVBoxLayout()
        self.url = QLineEdit()
        self.save_location = QLineEdit()
        self.progress = QProgressBar()
        download = QPushButton("Download")
        self.progress.setValue(0)
        self.progress.setAlignment(Qt.AlignHCenter)

        self.url.setPlaceholderText("URL")
        self.save_location.setPlaceholderText("Save folder:")

        layout.addWidget(self.url)
        layout.addWidget(self.save_location)
        layout.addWidget(self.progress)
        layout.addWidget(download)
        self.setLayout(layout)
        self.setWindowTitle("Downloader")
        download.clicked.connect(self.download)

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

        try:
            urllib.request.urlretrieve(url, save_location, self.report)
        except Exception:
            QMessageBox.warning(self, "Warning", "The download failed")
            return

        QMessageBox.information(self, "Information", "Download is complete")
        self.progress.setValue(0)
        self.url.setText("")
        self.save_location.setText("")

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


if __name__ == '__main__':
    app = QApplication(sys.argv)
    dl = Downloader()
    dl.show()
    app.exec_()
    sys.exit(app.exec_())

Useful Links

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