weblio.py

#!/usr/bin/python

import sys
from PyQt5.QtCore import *
from PyQt5.QtWidgets import QApplication
from PyQt5.QtWebEngineWidgets import *

app = QApplication(sys.argv)

web = QWebEngineView()

setty = QWebEngineView.settings(web)
setty.setFontFamily(QWebEngineSettings.StandardFont, "Source Han Sans JP")
setty.setFontFamily(QWebEngineSettings.SansSerifFont, "Source Han Serif JP")
setty.setFontFamily(QWebEngineSettings.SerifFont, "Source Han Serif JP")
setty.setAttribute(QWebEngineSettings.JavascriptEnabled, False)
setty.setAttribute(QWebEngineSettings.AutoLoadImages, False)

web.load(QUrl("https://ejje.weblio.jp/"))
web.show()

sys.exit(app.exec_())