Python:相对于当前正在运行的脚本添加到 sys.path 的最佳方式 [英] Python: Best way to add to sys.path relative to the current running script

问题描述

我有一个充满脚本的目录(比方说project/bin).我还有一个位于 project/lib 的库，并希望脚本自动加载它.这是我通常在每个脚本顶部使用的:

I have a directory full of scripts (let's say project/bin). I also have a library located in project/lib and want the scripts to automatically load it. This is what I normally use at the top of each script:

#!/usr/bin/python
from os.path import dirname, realpath, sep, pardir
import sys
sys.path.append(dirname(realpath(__file__)) + sep + pardir + sep + "lib")

# ... now the real code
import mylib

这有点麻烦，丑陋，必须粘贴在每个文件的开头.有没有更好的方法来做到这一点?

This is kind of cumbersome, ugly, and has to be pasted at the beginning of every file. Is there a better way to do this?

我真的希望像这样顺利:

Really what I'm hoping for is something as smooth as this:

#!/usr/bin/python
import sys.path
from os.path import pardir, sep
sys.path.append_relative(pardir + sep + "lib")

import mylib

或者更好的是，当我的编辑器(或其他具有提交访问权限的人)决定将导入重新排序作为其清理过程的一部分时，它不会中断:

Or even better, something that wouldn't break when my editor (or someone else who has commit access) decides to reorder the imports as part of its clean-up process:

#!/usr/bin/python --relpath_append ../lib
import mylib

这不会直接移植到非 posix 平台，但可以保持干净.

That wouldn't port directly to non-posix platforms, but it would keep things clean.

推荐答案

如果不想编辑每个文件

• 像普通的python库一样安装你的库
  或
• 将 PYTHONPATH 设置为您的 lib

• Install you library like a normal python libray
  or
• Set PYTHONPATH to your lib

或者如果您愿意为每个文件添加一行，请在顶部添加导入语句，例如

or if you are willing to add a single line to each file, add a import statement at top e.g.

import import_my_lib

将 import_my_lib.py 保留在 bin 中，import_my_lib 可以正确地将 python 路径设置为您想要的任何 lib

keep import_my_lib.py in bin and import_my_lib can correctly set the python path to whatever lib you want

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