pip 安装本地包到目标目录

Question

I have a Python library that is published to PyPI. Before pushing each new version of the library, I want to test it by upgrading a sample application to use the new version.

The suggested method to do this is to work in "development mode" using the -e (--editable) flag:

$ pip install -e <my package root>

And this does indeed install the package into my global environment.

However, my sample program is written for Google App Engine, which requires that all third-party libraries be copied into an application-specific folder (./lib in my case). I normally install packages here by using the -t (--target) option to pip:

$ pip install -t lib/ <package>

However, it appears that the -e and -t options are not compatible, and my attempts to install my local, unpublished library to a specified target folder by using both flags together fail.

How can I test my library package by installing it in a custom directory before publishing?

Answer 1

对于新软件包的一次性测试，直接从本地文件系统安装似乎是最好的选择：

$ cd /my/sample/application
$ pip install -t lib /my/local/package

当我对本地包进行进一步更改时，此安装不会保持同步（如果我要使用pip install --editable），但对于此用例，我可以在没有它的情况下生活。

我无法得到@pbaranay 的答案，因为该方式pip install -e使用了“egg-info”文件，而 GAE 的 dev_appserver.py 脚本显然无法理解/遍历这些文件。不过，创建 virtualenv 并将其符号链接到 lib （而不是使用 直接将软件包安装到 lib -t）的建议是一个很好的建议。