**kwargs) File /home/itcast/git-project/py34env/lib/python3.4/site-packages/click/core.py， line 697， in __call__ return self.main(*args， line 159。

stderr)) OSError: wkhtmltopdf exited with non-zero code -6. error: The switch --outline-depth， file_name， file_name) File runoob2pdf.py。

**kwargs) File runoob2pdf.py， options=options) File /home/itcast/git-project/py34env/lib/python3.4/site-packages/pdfkit/api.py， Traceback (most recent call last): File runoob2pdf.py， and will be ignored.QXcbConnection: Could not connect to display 解决方法： sudo apt-get update sudo apt-get install libxrender1 fontconfig xvfb wget https://github.com/wkhtmltopdf/wkhtmltopdf/releases/download/0.12.4/wkhtmltox-0.12.4_linux-generic-amd64.tar.xz -P /tmp/ cd /opt/ sudo tar xf /tmp/wkhtmltox-0.12.4_linux-generic-amd64.tar.xz sudo ln -s /opt/wkhtmltox/bin/wkhtmltopdf /usr/bin/wkhtmltopdf ， in from_file return r.to_pdf(output_path) File /home/itcast/git-project/py34env/lib/python3.4/site-packages/pdfkit/pdfkit.py， in main rv = self.invoke(ctx) File /home/itcast/git-project/py34env/lib/python3.4/site-packages/click/core.py， line 156， **ctx.params) File /home/itcast/git-project/py34env/lib/python3.4/site-packages/click/core.py， in module main() File /home/itcast/git-project/py34env/lib/python3.4/site-packages/click/core.py。

line 120， in to_pdf raise IOError(wkhtmltopdf exited with non-zero code {0}. error:\n{1}.format(exit_code， line 535， is not support using unpatched qt， line 146， in main save_pdf(htmls， in invoke return callback(*args。

line 722， line 49， in invoke return ctx.invoke(self.callback， line 895， in save_pdf pdfkit.from_file(htmls，。