- from typing import Optional
 - 
 - from pydantic import Field, PositiveInt
 - from pydantic_settings import BaseSettings
 - 
 - 
 - class AnalyticdbConfig(BaseSettings):
 -     """
 -     Configuration for connecting to Alibaba Cloud AnalyticDB for PostgreSQL.
 -     Refer to the following documentation for details on obtaining credentials:
 -     https://www.alibabacloud.com/help/en/analyticdb-for-postgresql/getting-started/create-an-instance-instances-with-vector-engine-optimization-enabled
 -     """
 - 
 -     ANALYTICDB_KEY_ID: Optional[str] = Field(
 -         default=None, description="The Access Key ID provided by Alibaba Cloud for API authentication."
 -     )
 -     ANALYTICDB_KEY_SECRET: Optional[str] = Field(
 -         default=None, description="The Secret Access Key corresponding to the Access Key ID for secure API access."
 -     )
 -     ANALYTICDB_REGION_ID: Optional[str] = Field(
 -         default=None,
 -         description="The region where the AnalyticDB instance is deployed (e.g., 'cn-hangzhou', 'ap-southeast-1').",
 -     )
 -     ANALYTICDB_INSTANCE_ID: Optional[str] = Field(
 -         default=None,
 -         description="The unique identifier of the AnalyticDB instance you want to connect to.",
 -     )
 -     ANALYTICDB_ACCOUNT: Optional[str] = Field(
 -         default=None,
 -         description="The account name used to log in to the AnalyticDB instance"
 -         " (usually the initial account created with the instance).",
 -     )
 -     ANALYTICDB_PASSWORD: Optional[str] = Field(
 -         default=None, description="The password associated with the AnalyticDB account for database authentication."
 -     )
 -     ANALYTICDB_NAMESPACE: Optional[str] = Field(
 -         default=None, description="The namespace within AnalyticDB for schema isolation (if using namespace feature)."
 -     )
 -     ANALYTICDB_NAMESPACE_PASSWORD: Optional[str] = Field(
 -         default=None,
 -         description="The password for accessing the specified namespace within the AnalyticDB instance"
 -         " (if namespace feature is enabled).",
 -     )
 -     ANALYTICDB_HOST: Optional[str] = Field(
 -         default=None, description="The host of the AnalyticDB instance you want to connect to."
 -     )
 -     ANALYTICDB_PORT: PositiveInt = Field(
 -         default=5432, description="The port of the AnalyticDB instance you want to connect to."
 -     )
 -     ANALYTICDB_MIN_CONNECTION: PositiveInt = Field(default=1, description="Min connection of the AnalyticDB database.")
 -     ANALYTICDB_MAX_CONNECTION: PositiveInt = Field(default=5, description="Max connection of the AnalyticDB database.")
 
 
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