How do I install Python 3.7 in google cloud shell

Question

I have python 3.5 on my google cloud shell and want 3.7 so I can do command line debugging of code I am going to deploy via google cloud functions (and use 3.7 features such

Answer 1

# install pyenv to install python on persistent home directory
curl https://pyenv.run | bash

# add to path
echo 'export PATH="$HOME/.pyenv/bin:$PATH"' >> ~/.bashrc
echo 'eval "$(pyenv init -)"' >> ~/.bashrc
echo 'eval "$(pyenv virtualenv-init -)"' >> ~/.bashrc

# updating bashrc
source ~/.bashrc

# install python 3.7.4 and make default
pyenv install 3.7.4
pyenv global 3.7.4

# execute
python

This is based on @yungchin answer.