jupyter nbconvert to PDF提高PermissionError：[WinError 5]

Question

我正在尝试将Jupyter笔记本转换为PDF文件，但我一直收到以下错误：

[NbConvertApp] Converting notebook ejercicios.ipynb to pdf
Traceback (most recent call last):
  ...
  File "c:\users\netoo\appdata\local\programs\python\python38\lib\site-packages\nbconvert\exporters\exporter.py", line 143, in from_notebook_node
    nb_copy, resources = self._preprocess(nb_copy, resources)
  File "c:\users\netoo\appdata\local\programs\python\python38\lib\site-packages\nbconvert\exporters\exporter.py", line 318, in _preprocess
    nbc, resc = preprocessor(nbc, resc)
  File "c:\users\netoo\appdata\local\programs\python\python38\lib\site-packages\nbconvert\preprocessors\base.py", line 47, in __call__
    return self.preprocess(nb, resources)
  File "c:\users\netoo\appdata\local\programs\python\python38\lib\site-packages\nbconvert\preprocessors\base.py", line 69, in preprocess
    nb.cells[index], resources = self.preprocess_cell(cell, resources, index)
  File "c:\users\netoo\appdata\local\programs\python\python38\lib\site-packages\nbconvert\preprocessors\convertfigures.py", line 45, in preprocess_cell
    output.data[self.to_format] = self.convert_figure(
  File "c:\users\netoo\appdata\local\programs\python\python38\lib\site-packages\nbconvert\preprocessors\svg2pdf.py", line 125, in convert_figure
    shell = self.command.format(from_filename=input_filename,
  File "c:\users\netoo\appdata\local\programs\python\python38\lib\site-packages\traitlets\traitlets.py", line 575, in __get__
    return self.get(obj, cls)
  File "c:\users\netoo\appdata\local\programs\python\python38\lib\site-packages\traitlets\traitlets.py", line 538, in get
    default = obj.trait_defaults(self.name)
  File "c:\users\netoo\appdata\local\programs\python\python38\lib\site-packages\traitlets\traitlets.py", line 1578, in trait_defaults
    return self._get_trait_default_generator(names[0])(self)
  File "c:\users\netoo\appdata\local\programs\python\python38\lib\site-packages\traitlets\traitlets.py", line 975, in __call__
    return self.func(*args, **kwargs)
  File "c:\users\netoo\appdata\local\programs\python\python38\lib\site-packages\nbconvert\preprocessors\svg2pdf.py", line 77, in _command_default
    major_verison = self.inkscape_version.split('.')[0]
  File "c:\users\netoo\appdata\local\programs\python\python38\lib\site-packages\traitlets\traitlets.py", line 575, in __get__
    return self.get(obj, cls)
  File "c:\users\netoo\appdata\local\programs\python\python38\lib\site-packages\traitlets\traitlets.py", line 538, in get
    default = obj.trait_defaults(self.name)
  File "c:\users\netoo\appdata\local\programs\python\python38\lib\site-packages\traitlets\traitlets.py", line 1578, in trait_defaults
    return self._get_trait_default_generator(names[0])(self)
  File "c:\users\netoo\appdata\local\programs\python\python38\lib\site-packages\traitlets\traitlets.py", line 975, in __call__
    return self.func(*args, **kwargs)
  File "c:\users\netoo\appdata\local\programs\python\python38\lib\site-packages\nbconvert\preprocessors\svg2pdf.py", line 57, in _inkscape_version_default
    p = subprocess.Popen([self.inkscape, '--version'],
  File "c:\users\netoo\appdata\local\programs\python\python38\lib\subprocess.py", line 858, in __init__
    self._execute_child(args, executable, preexec_fn, close_fds,
  File "c:\users\netoo\appdata\local\programs\python\python38\lib\subprocess.py", line 1311, in _execute_child
    hp, ht, pid, tid = _winapi.CreateProcess(executable, args,
PermissionError: [WinError 5] Acceso denegado

看起来该命令的默认权限不足以创建Inkscape进程，但我已经以管理员权限使用命令行。

去年我成功地将笔记本转换为PDF，这是同一台机器，但我使用的是另一个版本的Python，3.6或3.7，这与此有关吗？

Answer 1

我在这里报告了这个问题https://github.com/jupyter/nbconvert/issues/1525

我的临时解决方案是在安装Inkscape的地方使用绝对路径作为字符串文字，而不是调用self.inkscape，在我的例子中，路径是'C:\\Program Files\\Inkscape\\inkscape.exe'：https://github.com/jupyter/nbconvert/blob/88baf7a9ca724d74c9f890a60d5c3680e8959a14/nbconvert/preprocessors/svg2pdf.py#L57，在该行中我有p = subprocess.Popen(['C:\\Program Files\\Inkscape\\inkscape.exe', '--version']。

我打印了self.inkscape，输出结果是'C:\Program Files\Inkscape\inkscape.exe'。我认为这是因为双反斜杠，所以我尝试了os.path.abspath(self.inkscape)，但它添加了当前路径，从我在开始调用命令的位置开始。我也尝试过pathlib.Path(self.inkscape)，但它不起作用，所以我不知道问题出在哪里。