Create a new PDF object from scratch

[angea]

Is your feature request related to a problem? Please describe.
When I merged documents, I noticed that the /Info dictionary from the trailer is lost.

I noticed it's possible to copy it from the source file:

ref = old.xref_get_key(-1, "Info")[1]
ref_nb = int(ref.split(" ")[0])
info_dict = old.xref_object(ref_nb)

Then add it manually in the trailer of the new file:

new.xref_set_key(-1, "Info", info_dict)

Describe the solution you'd like
Instead of adding it to the trailer, I'd prefer to create a new object for that - like it was initially - but xref_set_keys` doesn't suit my needs.

[angea]

I realized that set_metadata could do the trick.

Is there a standard way to create new objects ourselves though ?

[JorjMcKie]

I realized that set_metadata could do the trick. Is there a standard way to create new objects ourselves though ?

This is the standard way: whether or not there was a metadata before, set_metadata will create one or overwrite one or whatever. You are also free to choose information from either source file, or mix those.

[JorjMcKie]

Your wording is somewhat ambiguous:
If you were asking whether you can create arbitrary other objects beyond metadata, the answer is also yes, for pretty much everything.