Python Boto3获取度量统计信息（）失败

我试图使用一个简单的get\u metric\u statistics脚本来返回关于实例的CPUUtilization的信息。以下是我希望使用的脚本：

import boto3
import datetime
cw= boto3.client("ec2",
                   aws_access_key_id=AWS.get("aws_access_key_id"),
                   aws_secret_access_key=AWS.get("aws_secret_access_key"),
                   region_name=AWS.get("region_name"))

cw1 = boto3.client("cloudwatch",
                   aws_access_key_id=AWS.get("aws_access_key_id"),
                   aws_secret_access_key=AWS.get("aws_secret_access_key"),
                   region_name=AWS.get("region_name")
                   )
response = cw.describe_instances()
InstanceId_Value = response.get("Reservations")[0].get("Instances")[0].get("InstanceId")
print(InstanceId_Value)

res = cw1.get_metric_statistics(
    Period=300,
    StartTime=datetime.datetime.utcnow() - datetime.timedelta(seconds=600),
    EndTime=datetime.datetime.utcnow(),
    MetricName='CPUUtilization',
    Namespace='AWS/EC2',
    Statistics=['Average'],
    Dimensions=[{'Name': 'InstanceId', 'Value':InstanceId_Value}]
)
print(res)

结果是：

i-074d0f8828bbe8cf7

Traceback (most recent call last):
File "/Users/xxxxxxxxx/tests.py", line 273, in <module>
Dimensions=[{'Name': 'InstanceId', 'Value':InstanceId_Value}]
File "/Users/xxxxxxxxxx/venv/lib/python3.6/site-packages/botocore/client.py", line 
276, in _api_call
return self._make_api_call(operation_name, kwargs)
File "/Users/xxxxxxxx/venv/lib/python3.6/site-packages/botocore/client.py", line 
586, in _make_api_call

raise error_class(parsed_response, operation_name)
botocore.exceptions.ClientError: An error occurred (AccessDenied) when calling the 
GetMetricStatistics operation: User: arn:aws-cn:iam::900300832618:user/prog is not 
authorized to perform: cloudwatch:GetMetricStatistics

}

---

任何指导都将不胜感激。

IAM用户

arn:aws cn:IAM:：900300832618:user/prog

无权访问这些指标。错误清楚地写着：

An error occurred (AccessDenied) when calling the 
GetMetricStatistics operation: User: arn:aws-cn:iam::900300832618:user/prog is not 
authorized to perform: cloudwatch:GetMetricStatistics

您需要向调用boto3脚本的用户或运行脚本的实例配置文件添加此类权限

An error occurred (AccessDenied) when calling the 
GetMetricStatistics operation: User: arn:aws-cn:iam::900300832618:user/prog is not 
authorized to perform: cloudwatch:GetMetricStatistics