Inconsistent output of match_anywhere about matchpy

[hbarthels]

To me, it looks like the problem is how you are using the Pattern class for pattern_1: Only the first argument is the actual pattern expressions, all the remaining arguments are expected to be constraints (see the docs). As a result, the actual pattern in the first case is only f_B(), which is correctly found three times. The second pattern is quite different, so you also get a different match.

Is rest[0] a sequence variable? It would be helpful if you could provide those details.

What do you want pattern_1 to look like? By itself, f_B(), rest[0] (without any enclosing operator) is not a valid expression.

I am a bit surprised that pattern_1 = Pattern(f_B(), rest[0]) doesn't produce an error. Perhaps it would be good if it did.

[flex361]

rest[0] is indeed a sequence variable.
I wanted pattern_1 to look like pattern_2. The reason I wrote pattern_1 this way is that I found this different behavior per accident and this result looked exactly like what I am looking for.

[hbarthels]

Do you know now how to achieve what you are looking for? If yes, I will close this issue.

[flex361]

Yes, now i know what i needed to know. Thank you.