[BUG] Unable to run Python version of cdk8s

Describe the bug Created new cdk8s python project and ran cdk8s synth got following error.

Error: the command ./main.py could not be found within PATH or Pipfile's [scripts].
Error: non-zero exit code 1
    at ChildProcess.<anonymous> (/usr/local/Cellar/cdk8s/0.21.0/libexec/lib/node_modules/cdk8s-cli/lib/util.js:18:27)
    at Object.onceWrapper (events.js:418:26)
    at ChildProcess.emit (events.js:311:20)
    at Process.ChildProcess._handle.onexit (internal/child_process.js:275:12)

Also tried running hello-python example getting following error:

Traceback (most recent call last):
  File "./main.py", line 2, in <module>
    from constructs import Construct
ModuleNotFoundError: No module named 'constructs'
Error: non-zero exit code 1
    at ChildProcess.<anonymous> (/usr/local/Cellar/cdk8s/0.21.0/libexec/lib/node_modules/cdk8s-cli/lib/util.js:18:27)
    at Object.onceWrapper (events.js:418:26)
    at ChildProcess.emit (events.js:311:20)
    at Process.ChildProcess._handle.onexit (internal/child_process.js:275:12)

To Reproduce

1. Initialized app using cdk8s init python-app
2. pipenv install followed by cdk8s import --language python then ran cdk8s synth

For hello-python followed instructions from README which is same as step 2

Expected behavior To get manifest files in dist folder

Additional context Operating System: macOS Mojave Python version: 3.8 and 3.7 Pipenv version: 2018.11.26 cdk8s Installation method: Homebrew Shell: Tried with Bash, Zsh, Fish

[030]

@eladb Sorry, but it does not seem to work. I just installed 0.24.0 and when I issue cdk8s, a command not found is returned. If I run the sample code, it does not work as well:

from constructs import Construct, Node

from imports import k8s

python file.py, returns:

Traceback (most recent call last):
  File "file.py", line 4, in <module>
    from imports import k8s
ModuleNotFoundError: No module named 'imports'

[trevorrobertsjr]

For anyone who may be running into this. I resolved due to a hint I picked up in the CDK documentation that pointed to cdk.json as an area that may need to be updated: https://docs.aws.amazon.com/cdk/latest/guide/work-with-cdk-python.html

cdk8s doesn’t have this config file, AFAIK, but I changed the Python interpreter command in in the cdk8s-generated main.py to python3 instead of python due to way that Python 3.7 is installed on my Mac.

Now my Mac is correctly-generating Python-based cdk8s manifests. I hope that helps someone else.