python - pip install 中的方括号是什么意思？

Question

我看到越来越多这样的命令:

$ pip install "splinter[django]"

这些方括号有什么作用？

Answer 1

您使用的语法是:

pip install "project[extra]"

---

在您的情况下，您正在安装 splinter 包，它增加了对django 的支持。方括号 ([]) 不是特定的语法，只是约定。确实，您正在安装名为:"splinter[django]".

的软件包

@chetner 的解释:

The command pip install splinter django would install two packages named splinter and django. splinter[django], on the other hand, installs a variant of the splinter package which contains support for django. Note that it has nothing to do with the django package itself, but is just a string defined by the splinter package for a particular feature set that gets enabled.