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Fix #537: Update AWS region logic for flexibility and defaults #669

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Fix #537: Update AWS region logic for flexibility and defaults #669

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12 changes: 9 additions & 3 deletions src/anthropic/lib/bedrock/_client.py
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,7 @@
import os
from typing import Any, Union, Mapping, TypeVar
from typing_extensions import Self, override
import boto3

import httpx

Expand Down Expand Up @@ -116,9 +117,8 @@ def __init__(

self.aws_access_key = aws_access_key

if aws_region is None:
aws_region = os.environ.get("AWS_REGION") or "us-east-1"
self.aws_region = aws_region
self.aws_region = aws_region or os.environ.get("AWS_REGION") or self.get_region_from_boto3() or "us-east-1"


self.aws_session_token = aws_session_token

Expand Down Expand Up @@ -167,6 +167,12 @@ def _prepare_request(self, request: httpx.Request) -> None:
)
request.headers.update(headers)

def get_region_from_boto3(
self
) -> str | None:
session = boto3.Session()
return session.region_name

def copy(
self,
*,
Expand Down