如何在python中绘制使用MySQL检索的带有温度和日期时间的线条

pip install matplotlib

import matplotlib.pyplot as plt
import mysql.connector

# 连接MySQL数据库
cnx = mysql.connector.connect(user='username', password='password',
                              host='localhost', database='database_name')

# 创建游标对象
cursor = cnx.cursor()

# 执行SQL查询语句
query = "SELECT temperature, datetime FROM table_name"
cursor.execute(query)

# 获取查询结果
temperatures = []
datetimes = []
for (temperature, datetime) in cursor:
    temperatures.append(temperature)
    datetimes.append(datetime)

# 关闭游标和数据库连接
cursor.close()
cnx.close()

# 绘制线条
plt.plot(datetimes, temperatures)

# 设置图表标题和坐标轴标签
plt.title('Temperature over Time')
plt.xlabel('Datetime')
plt.ylabel('Temperature')

# 显示图表
plt.show()