请写如下python代码，1.连接mmysql数据库 2.获取关键性能指标信息 3.指标信息转换为Prometheus Metrics 标准格式 4.输出结果-Go服务器开发

import mysql.connector
from prometheus_client import CollectorRegistry, Gauge, generate_latest

# 连接 MySQL 数据库并获取指标信息
def get_mysql_perf_indicators(host, port, user, password):
    cnx = mysql.connector.connect(user=user, password=password,
                                  host=host,
                                  port=port)
    cursor = cnx.cursor()
    cursor.execute("SHOW GLOBAL STATUS")
    indicators = {}
    for row in cursor:
        indicators[row[0]] = int(row[1])
    cnx.close()
    return indicators

# 指标名称映射字典，用于将 MySQL 指标转换为 Prometheus Metrics 格式的指标名和帮助文本
mysql_metrics_mapping = {
    'Bytes_received': ('mysql_network_bytes_received_total', 'Total number of bytes received from all clients'),
    'Bytes_sent': ('mysql_network_bytes_sent_total', 'Total number of bytes sent to all clients'),
    'Questions': ('mysql_queries_total', 'Total number of questions (queries) from clients'),
}

# 创建 Prometheus Metrics 格式的指标对象，并初始化为 0
registry = CollectorRegistry()
for _, (prom_metric_name, help_text) in mysql_metrics_mapping.items():
    g = Gauge(prom_metric_name, help_text, registry=registry)
    g.set(0)

# 获取 MySQL 指标信息，并更新 Prometheus Metrics 指标对象的值
indicators = get_mysql_perf_indicators('localhost', 3306, 'root', 'password')
for mysql_metric_name, (prom_metric_name, _) in mysql_metrics_mapping.items():
    g = registry.get(prom_metric_name)
    if g is not None:
        g.set(indicators.get(mysql_metric_name, 0))

# 将 Prometheus Metrics 格式的指标对象转换为字节数组，并输出结果
output = generate_latest(registry)
print(output.decode('utf-8'))

在上述代码中，首先定义了 get_mysql_perf_indicators() 函数用于连接 MySQL 数据库并获取关键性能指标信息。然后，定义了 mysql_metrics_mapping 字典，用于将 MySQL 指标转换为 Prometheus Metrics 格式的指标名和帮助文本。接下来，创建了 Prometheus Metrics 格式的指标对象，并初始化为 0。然后，获取 MySQL 指标信息，并更新 Prometheus Metrics 指标对象的值。最后，将 Prometheus Metrics 格式的指标对象转换为字节数组，并输出结果。

示例输出结果：

# HELP mysql_network_bytes_received_total Total number of bytes received from all clients
# TYPE mysql_network_bytes_received_total gauge
mysql_network_bytes_received_total 12345.0
# HELP mysql_network_bytes_sent_total Total number of bytes sent to all clients
# TYPE mysql_network_bytes_sent_total gauge
mysql_network_bytes_sent_total 67890.0
# HELP mysql_queries_total Total number of questions (queries) from clients
# TYPE mysql_queries_total gauge
mysql_queries_total 100000.0