python - AWS EC2 Boto3 中的 "start_instances() only accepts keyword arguments"错误

Question

我正在尝试使用 boto3 启动一个 EC2 实例。当我执行下面的代码时，它工作正常

import boto3


ec2client = boto3.client('ec2')

class StartInstances:

    def start_ec_instances(self):
        response = ec2client.start_instances(InstanceIds=['i-XXXXXXXXXX'])
        return

StartInstances().start_ec_instances()

但是当我运行下面的代码时，我得到了

import boto3


ec2client = boto3.client('ec2')

class StartInstances:

    def start_ec_instances(self, instanceid):
        response = ec2client.start_instances(instanceid)
        return

StartInstances().start_ec_instances('InstanceIds=[\'i-XXXXXXXXXX\']')

Traceback (most recent call last): File "/Users/xxx/PycharmProjects/ctm-scripting-utils/ec2/start_instances.py", line 25, in StartInstances().start_ec_instances("InstanceIds=[\'i-XXXXXXXXXX\']") File "/Users/xxx/PycharmProjects/ctm-scripting-utils/ec2/start_instances.py", line 11, in start_ec_instances response = ec2client.start_instances(instanceids) File "/Users/xxx/Library/Python/3.6/lib/python/site-packages/botocore/client.py", line 310, in _api_call "%s() only accepts keyword arguments." % py_operation_name) TypeError: start_instances() only accepts keyword arguments.

Answer 1

更多的是 Python 问题。您正在尝试传递 string:'InstanceIds=[\'i-XXXXXXXXXX\']' 而不是 kwargs:InstanceIds =[..]。一种可能的修复方法是:

class StartInstances:
    def start_ec_instances(self, instanceid):
        response = ec2client.start_instances(InstanceIds=[instanceid])
        return

StartInstances().start_ec_instances('i-XXXXXXXXXX')