当执行函数时，应用程序崩溃Python

Question

我很难找出为什么我使用PyCharm运行这个应用程序时python崩溃。 我将URL插入文件（https://download.scdn.co/SpotifySetup.exe）和保存位置（D：\）。只要按“下载”，Python就停止工作。

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


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

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

     layout.addWidget(url) 
     layout.addWidget(save_location) 
     layout.addWidget(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", "The 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)) 


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

Answer 1

我通过将self添加到几个变量名中，让您的代码在PyCharm中运行。

• url -> self.url
• save_location -> self.save_location
• progress -> self.progress

这里是更新的代码的一个要点是：

• https://gist.github.com/delirious-lettuce/324fdb51f1fdd0cfd76bfd257ea17e05