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在启动（startx）时使用绝对路径启动python脚本，其中存在相对路径

[英]Starting a python script on boot (startx) with an absolute path, in which there are relative paths

原文 2014-05-06 10:48:13 2 2 python/ path/ absolute-path

I realise this question may already exist, but the answers I've found haven't worked and I have a slightly different setup. 我意识到这个问题可能已经存在，但是我找到的答案没有用，并且我的设置略有不同。

I have a python file /home/pi/python_games/frontend.py that I am trying to start when lxde loads by placing @python /home/pi/python_games/frontend.py in /etc/xdg/lxsession/LXDE/autostart . 我有一个python文件/home/pi/python_games/frontend.py ，我正在尝试通过将@python /home/pi/python_games/frontend.py放在/etc/xdg/lxsession/LXDE/autostart来启动lxde时启动的python文件。

It doesn't run and there are no error messages. 它不会运行，并且没有错误消息。

When trying to run python /home/pi/python_games/frontend.py , python complains about not being able to find the files that are loaded using relative links eg: /home/pi/python_games/image.png is called with image.png . 尝试运行python /home/pi/python_games/frontend.py ，python抱怨无法找到使用相对链接加载的文件，例如： /home/pi/python_games/image.png用image.png 。 Obviously one solution would be to give these resources absolute paths, but the python program also calls other python programs in its directory that also have relative paths, and I don't want to go changing all them. 显然，一种解决方案是为这些资源提供绝对路径，但是python程序还会在其目录中调用其他python程序，这些程序也具有相对路径，因此我不想更改所有路径。

Anyone got any ideas? 任何人有任何想法吗？

Thanks Tom 谢谢汤姆

2 个解决方案

您可以在开始调用相对导入之前在脚本内更改当前工作目录，请使用os.chdir（“脚本所在的绝对路径”）。

Rather than change your current working directory, in your frontend.py script you could use the value of the predefined __file__ module attribute, which will be the absolute pathname of the script file, to determine absolute paths to the other files in the same directory. 您可以在frontend.py脚本中使用预定义的__file__模块属性的值（该脚本文件的绝对路径名）来确定同一目录中其他文件的绝对路径，而不必更改当前的工作目录。

Functions in the os.path module, such as split() and join() , will make doing this fairly easy. os.path模块中的函数，例如split()和join() ，将使此操作相当容易。