CSV & JSON

import json

# Python object -> JSON string
data = {"name": "Aph", "age": 25, "skills": ["python", "sql"]}
text = json.dumps(data, ensure_ascii=False, indent=2)
print(text)

# JSON string -> Python object
obj = json.loads(text)
print(obj["name"])     # Aph

# อ่าน/เขียนไฟล์ JSON
with open("data.json", "w", encoding="utf-8") as f:
    json.dump(data, f, ensure_ascii=False, indent=2)

with open("data.json", encoding="utf-8") as f:
    loaded = json.load(f)

import csv

# อ่านเป็น dict ต่อแถว (header เป็น key)
with open("users.csv", encoding="utf-8") as f:
    reader = csv.DictReader(f)
    for row in reader:
        print(row["name"], row["age"])

# เขียน CSV
rows = [{"name": "Aph", "age": 25}, {"name": "Bee", "age": 30}]
with open("out.csv", "w", newline="", encoding="utf-8") as f:
    writer = csv.DictWriter(f, fieldnames=["name", "age"])
    writer.writeheader()
    writer.writerows(rows)