擅长:python、mysql、java
<p>请仔细阅读文档<a href="https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/dynamodb.html#DynamoDB.Client.update_item" rel="nofollow noreferrer">here</a>:</p>
<p>您使用的是混合的Javascript和Python语法。应纠正如下:</p>
<pre><code>dydb_usertable.update_item(
Key = {
'userid': {
'N': 1234567890
}
},
ExpressionAttributeValues = { ":inc": {"N": "1"} },
UpdateExpression = "ADD likemetrics :inc"
})
</code></pre>