Question

我有一个 python for 循环，它应该使用 uuid_list 中的每个 uuid，然后转到正确的 AWS S3 存储桶、组织等获取正确的证书和密钥以将消息发送到 IOT主题。

uuid_list = ["cde2107e-8736-47de-9e87-2033c3063589", "7904f39f-97b0-4a6e-bd9d-fa692c40fe6f"]

for uuid in uuid_list:
        s3_client = boto3.client('s3')
        bucket = 'sensor-certificates'
        org = "abc", "def"
        object_str = org + '/' + uuid + '/'
        result = s3_client.list_objects(Bucket=bucket, Prefix=object_str)
        print('-------------------')
        print(result)
        print('-------------------')

我的问题是，随着规模的扩大，我现在拥有不止一个组织。我试过把它们放在一个列表中，就像上面一样，但我收到了错误

can only concatenate tuple (not "str") to tuple: TypeError
Traceback (most recent call last):
  File "/var/task/iot_sim_lambda.py", line 78, in lambda_handler
    object_str = org + '/' + uuid + '/'
TypeError: can only concatenate tuple (not "str") to tuple

谁能建议我在尝试获取证书时如何让循环识别多个组织

Answer 1

以下代码行将为您提供一个元组对象：-

org = "abc", "def"

这里的 org 是一个元组对象，您正试图将它与一个字符串连接起来。只需执行以下操作：-

org = "abc" + "def"

它会给你一个字符串，然后你可以将它与 uuid 连接起来。更新您的代码如下：-

uuid_list = ["cde2107e-8736-47de-9e87-2033c3063589", "7904f39f-97b0-4a6e-bd9d-fa692c40fe6f"]

for uuid in uuid_list:
        s3_client = boto3.client('s3')
        bucket = 'sensor-certificates'
        org = "abc" + "def"
        object_str = org + '/' + uuid + '/'
        result = s3_client.list_objects(Bucket=bucket, Prefix=object_str)
        print('-------------------')
        print(result)
        print('-------------------')

Answer 2

您显然需要将 org = "abc", "def" 转换为列表并将其移出循环。

uuid_list = ["cde2107e-8736-47de-9e87-2033c3063589", "7904f39f-97b0-4a6e-bd9d-fa692c40fe6f"]
orgs = ["abc", "def"]
for uuid in uuid_list:
    for org in orgs:
        s3_client = boto3.client('s3')
        bucket = 'sensor-certificates'
        object_str = org + '/' + uuid + '/'
        result = s3_client.list_objects(Bucket=bucket, Prefix=object_str)
        print('-------------------')
        print(result)
        print('-------------------')

Answer 3

uuid_list = ["cde2107e-8736-47de-9e87-2033c3063589", "7904f39f-97b0-4a6e-bd9d- 
fa692c40fe6f"]

for uuid in uuid_list:
        s3_client = boto3.client('s3')
        bucket = 'sensor-certificates'
        for org in ["abc", "def"]:
            object_str = org + '/' + uuid + '/'
            result = s3_client.list_objects(Bucket=bucket, Prefix=object_str)
            print('-------------------')
            print(result)
            print('-------------------')

Python for-loop 错误`TypeError: can only concatenate tuple (not "str") to tuple`

3 个答案: