import json

from sqlalchemy import text


def tem_now(session):
    query2 = text('SELECT city_name,temperature FROM tem_now_analyse ORDER BY temperature DESC LIMIT 7')
    data = session.execute(query2).fetchall()
    x = []
    y = []
    for i in data:
        x.append(i[0])
        y.append(float(i[1]))
    dict_list = {"x": x, "y": y}
    # Serialize the list of dictionaries to JSON
    data = json.dumps(dict_list, ensure_ascii=False, indent=4)

    # 将 JSON 数据写入 JavaScript 文件
    with open('data.js', 'a', encoding='utf-8') as js_file:
        js_file.write('const Chart4_Data = ')
        js_file.write(data)
        js_file.write("\n\n")