import csv,json
with open("multiline-input.json",encoding="utf-8") as f:
    original=json.load(f)
with open("new-output.csv",encoding="utf-8",newline="") as f:
    records=list(csv.reader(f,strict=True))
if not records or records[0]!=["id","note"]:
    raise ValueError("unexpected header")
rebuilt=[]
for row in records[1:]:
    if len(row)!=2:raise ValueError("unexpected width")
    rebuilt.append(dict(zip(records[0],row,strict=True)))
if rebuilt!=original:raise ValueError("parsed strings changed")