SyntaxError: invalid syntax (core.py, line 178) when trying to import chainladder package

I have created a reprex Project (https://rstudio.cloud/spaces/54476/project/1055533) in RStudioCloud with a virtual environment for Python3. When I try to load the chainladder package previously installed within that environment, it receives the following error message in RStudioCloud;-

> reticulate::repl_python()
Python 3.5.2 (/cloud/project/NSS/bin/python)
Reticulate 1.14.9001 REPL -- A Python interpreter in R.
>>> import chainladder as cl
SyntaxError: invalid syntax (core.py, line 178)

Here is the R script;-

install.packages("devtools")
devtools::install_github("rstudio/reticulate")
library(reticulate)
virtualenv_create("NSS", python = "/usr/bin/python3")
virtualenv_install('NSS', 'chainladder')
use_virtualenv('NSS', required = T)

Here is the Python script;-

import chainladder as cl

This works satisfactorily on my desktop version of R/RStudio. Any suggestions, please?

[jbogaardt]

No worries, I do claim python 3.5 compatibility so I should keep the tutorials that way too.

[aegerton]

Thanks very much again @jbogaardt