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I want to use Python to convert some html files to PDF. After looking at the modules and possibilities to do this, I settled on Qt5.

I have code that works, but it doesn't work exactly how I want. I want to run my program via the command line, and it to exit once finished. Currently, it produces the PDF but stays running.

If I uncomment and show the QWebEngineView with view.show(), then I can close the window that opens and the program will exit. (But I don't want to have any GUI, so this isn't good)

Next, I tried to show the view, then immediately close it after with view.close(), but when I do this a PDF doesn't get generated. I tried adding a 5 second sleep after view.show() and before view.close(), but still the same result.

I'm not sure if what I want is possible, I understand Qt is for GUIs but it would be very convenient if I could get this working completely through the command line.

import sys import os from time import sleep from PyQt5.QtWidgets import QApplication from PyQt5.QtWebEngineWidgets import QWebEngineView from PyQt5.QtCore import QDir, QUrl # needed to load local html files sys.argv.append("--disable-web-security") app = QApplication(sys.argv) raw_html = "" with open('webpage.htm', 'r') as myfile: raw_html = myfile.read() view = QWebEngineView() view.setHtml(raw_html) def save_pdf(finished): view.page().printToPdf("output.pdf") # view.show() # view.close() view.loadFinished.connect(save_pdf) sys.exit(app.exec_())
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  • what is your pyqt version? Commented Nov 9, 2018 at 14:47

1 Answer 1

Reset to default
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Try it:

import sys from PyQt5 import QtCore, QtWidgets, QtWebEngineWidgets app = QtWidgets.QApplication(sys.argv) loader = QtWebEngineWidgets.QWebEngineView() loader.setZoomFactor(1) loader.page().pdfPrintingFinished.connect(loader.close) # <--- loader.load(QtCore.QUrl('https://en.wikipedia.org/wiki/Main_Page')) def emit_pdf(finished): #loader.show() loader.page().printToPdf("test.pdf") loader.loadFinished.connect(emit_pdf) app.exec()
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4 Comments

Thanks, but: AttributeError: 'QWebEnginePage' object has no attribute 'pdfPrintingFinished'
@BenKailon update your pyqt5, the pdfPrintingFinished signal was recently implemented in Qt 5.9
@eyllanesc ah it was 5.8.1, I didn't even think about that. Sorry. Now, after updating, I get a different error. ImportError: cannot import name 'QtWebEngineWidgets' After a little research it looks like the 32 bit Windows PyQt5 wheels that pip installs don't have QtWebEngineWidgets anymore... This is getting complicated!
Just a win32 issue, but after downgrading pyqt5 to 5.10, it's working perfectly. Thanks to both of you.

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