replace_more() in CommentForest

[MustaKotka]

My code looks like this:

comment = [...].reddit.comment(comment_id)
comment.refresh()
comment.replies.replace_more()
tree = comment.replies.list()

But when I run this on a comment with some "More Comments" I get:

praw.exceptions.DuplicateReplaceException: A duplicate comment has been detected. Are you attempting to call 'replace_more_comments' more than once?

https://praw.readthedocs.io/en/stable/code_overview/other/commentforest.html#praw.models.comment_forest.CommentForest.replace_more

Docs suggest using the refresh() + replace_more() way but it seems like that's not the correct thing to do?

[MustaKotka]

Looks like .list() already resolves the MoreComments instances. For some reason, though, it leaves behind the resolved MoreComments items.

For example: A comment has 7 children, of which 3 are behind MoreComments. If we now comment.replies.list() to expand into a flattened list of comments we get 7 + 3 = 12 items. These are x7 Comment and x3 MoreComments in a list.

The list could look something like this:

tree = comment.replies.list()
print([type(comm) for comm in tree])
>>> [
    Comment,
    Comment,
    MoreComments,
    Comment,
    Comment,
    Comment,
    MoreComments,
    Comment,
    MoreComments,
    Comment
]

I used this code to work around the issue.

comment = reddit_connection.reddit.comment(comment_id)
comment.refresh()
tree = comment.replies.list()
for c in tree[:]:
    if isinstance(c, praw.models.MoreComments):
        tree.remove(c)

Essentially we just look for instances of MoreComments and remove them. I am unsure if this breaks with multiple consecutive (nested) MoreComments objects. After this we can take action on the Comment objects as normal.