Function python_sphinx_doc_comment 

pub fn python_sphinx_doc_comment<'a>(
    comment: &Node<'a>,
    code: &[u8],
    ancestors: Ancestors<'a, '_>,
    credit: impl FnMut(usize, usize),
)

Credits the rows of a Sphinx doc comment that comment completes (#1597). Sphinx autodoc reads a comment starting #: as an attribute’s documentation when it sits on the line of an assignment, after the code, or on the consecutive lines directly above one — every one of them #:; a plain # line breaks the block. The assignment must be one an attribute docstring may follow (module or class level, or self.<attr> at the top of __init__).

A block is decided once, at its last #: line, which walks back over the block to credit it: credit(first_row, last_row) per line. The grammar places a comment that precedes a body’s first statement outside that body, as a child of the class or function, so the statement after it is the body block’s first statement.