PyQT5不工作在ImportError: libsmime3.so:无法打开共享对象文件:没有这样的文件或目录

Question

我有一个带有PyQT的Dockerfile，如下所示

FROM ubuntu:20.04
ENV DEBIAN_FRONTEND=noninteractive
RUN adduser --quiet --disabled-password qtuser && usermod -a -G audio qtuser
RUN apt-get update -y \
    && apt-get install alsa -y \
    && apt-get install -y python3-pyqt5 \
    && apt-get install python3-pip -y && \
    pip3 install pyqtwebengine
WORKDIR /htmltopdf

我把我的形象塑造成这样的docker build -t html-to-pdf .

然后我运行我的图像，像这样的docker run --rm -v "$(pwd)":/htmltopdf -u qtuser -it html-to-pdf python3 htmlToPdfnew.py --url https://www.w3schools.com/howto/howto_css_register_form.asp

但我的错误越来越少了

Traceback (most recent call last):
  File "htmlToPdfnew.py", line 2, in <module>
    from PyQt5 import QtWidgets, QtWebEngineWidgets
ImportError: libsmime3.so: cannot open shared object file: No such file or directory

我在我的电脑里没有那个错误。

下面是我的python代码

import sys
from PyQt5 import QtWidgets, QtWebEngineWidgets
from PyQt5.QtCore import QUrl, QTimer
from PyQt5.QtGui import QPageLayout, QPageSize
from PyQt5.QtWidgets import QApplication
import argparse


def main():
    url = ''
    parser = argparse.ArgumentParser(description="Just an example", formatter_class=argparse.ArgumentDefaultsHelpFormatter)
    parser.add_argument("--url", help="Type url")
    args = parser.parse_args()
    config = vars(args)
    url = config['url']


    app = QtWidgets.QApplication(sys.argv)
    loader = QtWebEngineWidgets.QWebEngineView()
    loader.setZoomFactor(1)
    layout = QPageLayout()
    layout.setPageSize(QPageSize(QPageSize.A4Extra))
    layout.setOrientation(QPageLayout.Portrait)
    loader.load(QUrl(url))
    loader.page().pdfPrintingFinished.connect(lambda *args: QApplication.exit())

    def emit_pdf(finished):
        QTimer.singleShot(2000, lambda: loader.page().printToPdf("test.pdf", pageLayout=layout))

    loader.loadFinished.connect(emit_pdf)
    sys.exit(app.exec_())

if __name__ == '__main__':
    main()

那么如何解决下面的错误呢？

Traceback (most recent call last):
  File "htmlToPdfnew.py", line 2, in <module>
    from PyQt5 import QtWidgets, QtWebEngineWidgets
ImportError: libsmime3.so: cannot open shared object file: No such file or directory

Answer 1

您必须在Docker映像中安装libnss3。

将apt-get install libnss3添加到Dockerfile中的安装命令中应该可以做到这一点。