AWS CDK python client giving error with cdk deploy - amazon-web-services

Question

My stack:
python 3.6
Node.js 11.3.0
jsii-0.20.11 (automatically installed when aws cdk is installed via npm)
I just tried cdk init and then did pip install -e.
After that, I did cdk deploy and it gives me the following error:
Traceback (most recent call last):
File "app.py", line 3, in <module>
from aws_cdk import core
File "C:\Users\sgoud12\myfolder\myprojects\myapp\cdk\.env\lib\site-packages\aws_cdk\core\__init__.py", line 1967, in <module>
class DependableTrait(metaclass=jsii.JSIIAbstractClass, jsii_type="#aws-cdk/core.DependableTrait"):
TypeError: __new__() got an unexpected keyword argument 'jsii_type'
Subprocess exited with error 1
(.env) C:\Users\sgoud12\myfolder\myprojects\myapp\cdk>
(.env) C:\Users\sgoud12\myfolder\myprojects\myapp\cdk>fs.js:122
throw err;
^
Error: EOF: end of file, read
at Object.readSync (fs.js:517:3)
at SyncStdio.readLine (C:\Users\sgoud12\myfolder\myprojects\myapp\cdk\.env\lib\site-packages\jsii\_embedded\jsii\jsii-runtime.js:13350:25)
at InputOutput.read (C:\Users\sgoud12\myfolder\myprojects\myapp\cdk\.env\lib\site-packages\jsii\_embedded\jsii\jsii-runtime.js:13300:34)
at KernelHost.run (C:\Users\sgoud12\myfolder\myprojects\myapp\cdk\.env\lib\site-packages\jsii\_embedded\jsii\jsii-runtime.js:7231:32)
at Immediate.setImmediate (C:\Users\sgoud12\myfolder\myprojects\myapp\cdk\.env\lib\site-packages\jsii\_embedded\jsii\jsii-runtime.js:7239:37)
at processImmediate (timers.js:632:19)

Answer 1

It usually means some kind of versions missmarch: aws-cdk in npm and aws-cdk in python. Given that it's a pretty old question I suppose updating all packages or even reinstall the environment should help.
There are mentions of a similar problem in the official aws-cdk bug tracker:
https://github.com/aws/aws-cdk/issues/3349
https://github.com/aws/aws-cdk/issues/3293

Answer 2

I agree, this is frustrating and hard to find a fix for. Using the links from #Trilliput
My Steps:
Uninstall pip
Update homebrew
Remove the aws cli
Reinstall the aws cli
uninstall aws cdk
reinstall aws cdk
Commands:
sudo pip uninstall pip
brew update
sudo rm /usr/local/bin/aws
sudo rm /usr/local/bin/aws_completer
sudo rm -rf /usr/local/aws-cli
curl "https://awscli.amazonaws.com/AWSCLIV2.pkg" -o "AWSCLIV2.pkg"
sudo installer -pkg AWSCLIV2.pkg -target /
pip3 uninstall aws-cdk.cdk
pip3 install aws-cdk.cdk --use-feature=2020-resolver
That didn't work as I hoped, so I used all of these commands below. I called it to scorched earth reinstall:
sudo pip uninstall pip
brew update
sudo rm /usr/local/bin/aws
sudo rm /usr/local/bin/aws_completer
sudo rm -rf /usr/local/aws-cli
brew uninstall node
brew uninstall pyenv
# CLOSE your terminal window and open a NEW terminal window.
# when you run [which python] you should get /usr/bin/python
# run these commands to remove node and npm
https://gist.github.com/TonyMtz/d75101d9bdf764c890ef
curl "https://awscli.amazonaws.com/AWSCLIV2.pkg" -o "AWSCLIV2.pkg"
sudo installer -pkg AWSCLIV2.pkg -target /
curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py
python get-pip.py
python3 get-pip.py
brew install python3
# old CDK
pip3 uninstall aws-cdk.cdk
#new CDK
pip3 uninstall aws-cdk.core
# NEW CDK
pip3 install aws-cdk.core
#pip3 install aws-cdk.core --use-feature=2020-resolver
# reinstall aws cdk
npm install -g aws-cdk
npm install -g npm#7.0.13
sudo npm install -g npm#7.0.13
npm install -g aws-cdk
sudo npm install -g aws-cdk
sudo -i
sudo npm install -g aws-cdk
cdk --version

Answer 3

Bumping up the python version from 3.6 to 3.7.5 worked like a charm for me