litellm APIConnection error - missing boto3

[sringopi]

Issue

When running a model from Bedrock, getting a boto3 library error, potentially because of litellm issue.

 % aider --model bedrock/anthropic.claude-3-5-sonnet-20241022-v2:0
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Aider v0.70.0
Main model: bedrock/anthropic.claude-3-5-sonnet-20241022-v2:0 with diff edit format, infinite output
Weak model: bedrock/anthropic.claude-3-5-haiku-20241022-v1:0
Git repo: .git with 425 files
Repo-map: using 1024 tokens, auto refresh
─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
> help                                                                                                                                                               


litellm.APIConnectionError: Missing boto3 to call bedrock. Run 'pip install boto3'.
Traceback (most recent call last):
  File "/Users/tom/.local/share/uv/tools/aider-chat/lib/python3.12/site-packages/litellm/llms/bedrock/chat/converse_handler.py", line 206, in completion
    import boto3
ModuleNotFoundError: No module named 'boto3'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/tom/.local/share/uv/tools/aider-chat/lib/python3.12/site-packages/litellm/main.py", line 2610, in completion
    response = bedrock_converse_chat_completion.completion(
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/tom/.local/share/uv/tools/aider-chat/lib/python3.12/site-packages/litellm/llms/bedrock/chat/converse_handler.py", line 211, in completion
    raise ImportError("Missing boto3 to call bedrock. Run 'pip install boto3'.")
ImportError: Missing boto3 to call bedrock. Run 'pip install boto3'.

You need to: pip install boto3

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>  

Version and model info

Aider v0.70.0
Main model: bedrock/anthropic.claude-3-5-sonnet-20241022-v2:0
Testing on git repo of aider.