基于主题名称验证是否存在主题

Question

我正在根据主题名验证是否存在主题。在

你知道这是否可能吗？在

例如，我想验证名为“test”的主题是否已经存在。在

下面是我正在尝试的，但不起作用，因为topicsList包含topicArns而不是topicNames。。。在

topics = sns.get_all_topics()   
topicsList = topics['ListTopicsResponse']['ListTopicsResult'['Topics']

if "test" in topicsList:
    print("true")

Answer 1

如果您试图捕获An error occurred (NotFound) when calling the GetTopicAttributes operation: Topic does not exist异常怎么办？在

from botocore.exceptions import ClientError

topic_arn = "arn:aws:sns:us-east-1:999999999:neverFound"

try:
    response = client.get_topic_attributes(
        TopicArn=topic_arn
    )
    print "Exists"
except ClientError as e:
    # Validate if is this:
    # An error occurred (NotFound) when calling the GetTopicAttributes operation: Topic does not exist
    print "Does not exists"