Python 没有为 aws sam cli 配置

Question

I am following this tutorial to build a SAM App: https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/serverless-getting-started-hello-world.html

When i did sam build , I got following error

❯ sam build
Building codeuri: hello_world/ runtime: python3.8 metadata: {} functions: ['HelloWorldFunction']

Build Failed
Error: PythonPipBuilder:Validation - Binary validation failed for python, searched for python in following locations  : ['/usr/bin/python'] which did not satisfy constraints for runtime: python3.8. Do you have python for runtime: python3.8 on your PATH?

I checked my python by doing this

❯ which python
python: aliased to python3

And when i do python version, i got this

❯ python --version
Python 3.8.2

So what's i am missing and how to fix this problem?

Answer 1

When selecting "Use the most popular runtime and package type? [y/N]" in the terminal, AWS SAM uses Python 3.9 runtime. This means you need to have Python 3.9 installed on your machine.

Also note, AWS SAM CLI does not support Python 3.10. I had to downgrade to Python 3.9.11 in order for this to work.

Answer 2

I was facing same issue but after setting python 3.8 in the classpath problem resolved.

Answer 3

python3 --version

solution found. you might have selected python3.8/python3.7 as your runtime for the app. The error occurs when there is mismatching the python version of your system. check python version: python3 --version and use the same runtime of app as same as your system's python version.