Question

我是python的新手，正在学习这种强大的语言。我设法编写以下脚本。它确实得到了部分输出（只有两行）我不知道出了什么问题！请帮帮我。

#!/usr/bin/env python
#-*- coding: utf-8 -*-

from PyQt4 import QtCore, QtGui
from PyQt4.QtCore import (QProcess,QRect,SIGNAL,SLOT,QString,QStringList,qDebug)
from PyQt4.QtGui import (QMainWindow,QWidget,QPushButton,QTextEdit,QApplication)

class YTDL (QtGui.QMainWindow):
    def __init__ (self,parent=None):
        super(YTDL,self).__init__(parent)

        self.resize(400,300)
        self.setWindowTitle("Youtube-dl output using QProcess")

        self.__init_Components()
        self.__ui_event_handler()

    def __init_Components(self):
        self.proc = QProcess()
        self.cw = QWidget(self)

        self.btn = QPushButton(self.cw)
        self.btn.setText("Run")
        self.btn.setGeometry(QRect(270,10,110,27))

        self.te = QTextEdit(self.cw)
        self.te.setReadOnly(True)
        self.te.setOverwriteMode(False)
        self.te.setGeometry(QRect(10,40,380,170))

        self.setCentralWidget(self.cw)

    def __ui_event_handler(self):
        self.connect(self.btn, SIGNAL('clicked()'),self.Button_Clicked)


    def Button_Clicked(self):
        args = '-ct -f 18 --extract-audio --audio-quality 320k --audio-format mp3 -k http://www.youtube.com/watch?v=OiPO_TAAZPc'
        cmd = 'youtube-dl'
        self.proc.setWorkingDirectory("~/Videos/Folder1")
        self.connect(self.proc, SIGNAL('readyRead()'),self._read)
        self.proc.setOpenMode(self.proc.ReadWrite)
        self.proc.start(cmd ,args)
        if not self.proc.waitForStarted():
            exit(1)

    def _read(self):
        s = self.proc.readAllStandardOutput()
        qDebug (s)
        print (s)
        self.te.append(QString(s)) 



def main():
    import sys
    app = QApplication(sys.argv)
    ytdl = YTDL()
    ytdl.show()
    sys.exit(app.exec_())


if __name__ == '__main__':
    main()

Answer 1

我想我自己弄清楚了。这是下面的全部改进版本。如果有什么需要改进的话，我会欢迎任何建议。

类YTDL（QtGui.QMainWindow）： def init （self，parent = None）：超级（YTDL，自我）。的初始化（父）

self.resize(400,350) self.setWindowTitle("Youtube-dl output using QProcess") self.__init_Components() self.__ui_event_handler() def __init_Components(self): self.proc = QProcess() self.cw = QWidget(self) self.btn = QPushButton(self.cw) self.btn.setText("Run") self.btn.setGeometry(QRect(270,10,110,27)) self.te = QTextEdit(self.cw) self.te.setReadOnly(True) self.te.setOverwriteMode(False) self.te.setGeometry(QRect(10,40,380,170)) self.progbar = QProgressBar(self.cw) self.progbar.setGeometry(QRect(10,220,380,18)) self.progbar.setRange(0,100) self.progbar.setValue(0) self.progbar.show() self.setCentralWidget(self.cw) def __ui_event_handler(self): self.connect(self.btn, SIGNAL('clicked()'),self.Button_Clicked) self.connect(self.proc, SIGNAL('readyReadStandardOutput()'),self._read) self.connect(self.proc, SIGNAL('readyReadStandardError()'),self._readError) def Button_Clicked(self): args = "-ct -f 18 --extract-audio --audio-quality 320k --audio-format mp3 -k http://www.youtube.com/watch?v=SjUrib_Gh0Y" cmd = "youtube-dl" cmd = cmd + " " + args print (cmd) self.proc.setWorkingDirectory("~/Videos/Folder1") self.proc.setOpenMode(self.proc.ReadWrite) self.proc.start(cmd) self.proc.waitForStarted() def _read(self): s = str(self.proc.readAllStandardOutput()) download_progress_exp = re.compile(r'.\d+\.\d+\%', re.MULTILINE) progbarresult = download_progress_exp.findall(s) i = 0 if progbarresult != []: for i in range(0,len(progbarresult)): self.progbar.setValue(float(progbarresult[i].strip("%"))) self.te.append(QString(s)) def _readError(self): self.te.append(str(self.proc.readAllStandardError()))

使用QProcess输出youtube-dl

1 个答案: