AWS SAM CLIでAttributeError
https://github.com/awslabs/aws-sam-cli/issues/442#issuecomment-602436824
code:fish
sam validate --profile dev
→
AttributeError: 'NoneType' object has no attribute 'startswith'
AWS CLIのconfigに追記
code:~/.aws/config
default
region = ap-northeast-1
→解消
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