Escape Python to `json[]` for `COPY FROM` PostgreSQL insertion?

How do I insert into a table with a `json[]` column using the `COPY FROM`
syntax?

Attempt:
https://gist.github.com/SamuelMarks/fec744a620e2abd0257671aa6f2a96b4

Error:
psycopg2.errors.InvalidTextRepresentation: malformed array literal:
"{"jj":null,"text":"bop"}"

Or when I try to json.dump the dict twice I get:
psycopg2.errors.InvalidTextRepresentation: malformed array literal:
""{"jj":null,"text":"bop"}"" DETAIL: Array value must start with "{" or
dimension information. CONTEXT: COPY my_table, line 1, column
json_arr_col: ""{"jj":null,"text":"bop"}""

I'm using your `copy_expert` function. PS: Also asked on
https://stackoverflow.com/q/75511919

Am I meant to represent the lists with braces rather than square brackets?
- Or should I be using some internal psycopg function as opposed to my
hacked together `parse_col` function?

Thanks,

Samuel Marks
Charity <https://sydneyscientific.org> | consultancy <https://offscale.io>
| open-source <https://github.com/offscale> | LinkedIn
<https://linkedin.com/in/samuelmarks>