How does one best search for keywords in Python's documentation?

I am looking for documentation (in Python’s official documentation) regarding the “in” keyword. I have found the section 2.3.1 about reserved keywords with no troubles, but if I want to find the documentation specifically for the “in” keyword, I run into a problem.

Things I have tried:

  1. Googling for the “in” keyword
  2. Searching the Python documentation for the “in” keyword.

There are other sites that describe the “in” keyword, but I just can’t find the right place in the official documentation. What am I missing? Does anyone else run into this problem?

Edit: In case anyone is looking for this specific case, “in” is a called a “membership test operation” (in 3.11.2’s documentation, it can be found under section 6.10.2).

Related: Why is there no official (python.org) documentation specifying ALL Python keywords, with each being given its own page with links to other areas of documentation that describe them?

Use the index. Many but not all keywords are listed under ‘keywords’.

Thank you. This answers my question, I appreciate it.