Walker?

https://www.pygit2.org/commit_log.html describes a Walker object, but does not explain how to get one or how to use it. Are we to infer that the the iterator produced by the call to Repository.walk() immediately above is an object of type Walker? When I debug that seems to be the case.

For example, if heads is a list of heads and w a Walker, will

for h in heads:
    w.push(h)
    for cmt in w:
        do_stuff(cmt)

call do_stuff exactly once (i.e., the walker remembers and ignores commits already visited on later calls) for each commit in my repository that is reachable from any head?

https://www.pygit2.org/commit_log.html の commit_log ドキュメントと Repository.walk() の説明から始めます。Walker をどのように取得して使用するのか、また、繰り返し行う push 呼び出しの間で反復処理が訪問済みの commit を保持するかどうかを明確にします。ページを読めば、読者が推測しなくても例の動作が分かるようになれば完了です。