您可以通过pythonrc文件添加路径，该文件默认为~/。linux上的Pythonrc。ie。

import sys
sys.path.append('/path/to/dir')

您还可以在全局rc文件中设置PYTHONPATH环境变量，例如~/。mac或linux上的配置文件，或通过控制面板->系统->高级选项卡-> windows上的环境变量。

在Python 3.6.4中，可以持久化sys。通过python会话的路径如下所示:

import sys
import os

print(str(sys.path))

dir_path = os.path.dirname(os.path.realpath(__file__))
print(f"current working dir: {dir_path}")

root_dir = dir_path.replace("/util", '', 1)
print(f"root dir: {root_dir}")

sys.path.insert(0, root_dir)

print(str(sys.path))

我强烈建议你使用virtualenv和virtualenvwrapper，否则你会弄乱你的路径

为了给出更多的解释，Python将使用site.py脚本(通常位于sys. py中)自动构造它的搜索路径(如上所述和这里)。Prefix + lib/python<version>/site-packages以及lib/site-python)。可以获取sys.prefix的值:

python -c 'import sys; print(sys.prefix)'

The site.py script then adds a number of directories, dependent upon the platform, such as /usr/{lib,share}/python<version>/dist-packages, /usr/local/lib/python<version>/dist-packages to the search path and also searches these paths for <package>.pth config files which contain specific additional search paths. For example easy-install maintains its collection of installed packages which are added to a system specific file e.g on Ubuntu it's /usr/local/lib/python2.7/dist-packages/easy-install.pth. On a typical system there are a bunch of these .pth files around which can explain some unexpected paths in sys.path:

python -c 'import sys; print(sys.path)'

因此，可以创建一个.pth文件，并将其放在这些目录中的任何一个目录中(包括上面提到的sitedir)。这似乎是大多数包被添加到系统的方式。而不是使用PYTHONPATH。

Note: On OSX there's a special additional search path added by site.py for 'framework builds' (but seems to work for normal command line use of python): /Library/Python/<version>/site-packages (e.g. for Python2.7: /Library/Python/2.7/site-packages/) which is where 3rd party packages are supposed to be installed (see the README in that dir). So one can add a path configuration file in there containing additional search paths e.g. create a file called /Library/Python/2.7/site-packages/pip-usr-local.pth which contains /usr/local/lib/python2.7/site-packages/ and then the system python will add that search path.

在linux上，您可以创建从包到PYTHONPATH目录的符号链接，而不必处理环境变量。喜欢的东西:

ln -s /your/path /usr/lib/pymodules/python2.7/

我找到了一个解决方案，在水蟒环境中做到这一点:https://datacomy.com/python/anaconda/add_folder_to_path/

只是:

Conda develop /your_path

将export PYTHONPATH="${PYTHONPATH}:/my/other/path"添加到~/。如果PYTHONPATH当前不存在(因为:)，bashrc可能无法工作。

export PYTHONPATH="/my/other/path1"
export PYTHONPATH="${PYTHONPATH}:/my/other/path2"

将以上内容添加到我的~/。bashrc在Ubuntu 16.04上为我完成了这个任务