subprocess.run parameters not fully documented

https://docs.python.org/3/library/subprocess.html#subprocess.run

So I want to capture STDERR, but it doesn't actually say how to do that anywhere that I can see. Note that I don't want to capture STDOUT.

My IDE is telling me that stderr accepts None and Int types. What are the int values? I'm guessing a PIPE:

subprocess.PIPE
Special value that can be used as the stdin, stdout or stderr argument to Popen and indicates that a pipe to the standard stream should be opened.

Now the user also needs to understand the inner workings of Popen? Why on earth does a user need to join so many dots just to use an arguement? Is not explicit is better than implicit part of the python ethos?

I'm sorry to be blunt, but none of this is well documented. There should be a comprehensive, itemised list of all parameters. Each one should explicitly list what they do and what their possible values are. As it is, it's a confused mess of "if x, then y in module q, but not z in module p".

从 issue 中链接的 subprocess.run 文档开始，将其参数描述与所引用的 Popen 文档进行比较，尤其关注 stderr 和 subprocess.PIPE。完成的标准是：参数及其接受的值都有足够清晰的文档说明，能够解释如何捕获 STDERR，而不要求读者从另一个 API 推断行为。