(cli): Mac Homebrew-installed Node interferes with Python CDK applications

Bug

I have a basic Python CDK application with all the dependencies installed inside a Python virtual env. From the CLI while inside the virtual env, I can cdk synth my app successfully and cdk deploy correctly starts the deployment process. However, using a cdk-deploy-to script from here, which calls npx cdk deploy, I get the following error:

Traceback (most recent call last):
  File "/REMOVED/app.py", line 4, in <module>
    from aws_cdk import (
ModuleNotFoundError: No module named 'aws_cdk'
Subprocess exited with error 1

Calling npx cdk deploy yields the same error. Somehow invoking cdk through npx is using a different environment.

Environment

• CDK CLI Version: 1.116.0 (build d04661d)
• Node.js Version: v14.13.1
• OS : macOS 11.5.1
• Language (Version): Python 3.7

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This is 🐛 Bug Report

[kbakk]

Playing some more around with this, I tried changing cdk.json:

-  "app": "python3 app.py",
+  "app": "python app.py",

That results in cdk ls working as well.

Finding this a bit strange, as this command works:

python3 -c 'import aws_cdk; print(aws_cdk)'
<module 'aws_cdk' from '/Users/krisb/Code/temp/cdk_workshop/.venv/lib/python3.10/site-packages/aws_cdk/__init__.py'>

Vastly prefer this over the other workaround I mention above. Curious if this works for others here.

[github-actions[bot]]

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