tests/testthat/test-aaa.R

In rstudio/reticulate: Interface to 'Python'

# TODO: throw error in py_initialize() if attempting to bind to Python 2, then delete this test helper

# prefer Python 3 if available
if (!is_windows() &&
    !py_available(initialize = FALSE) &&
    is.na(Sys.getenv("RETICULATE_PYTHON", unset = NA)))
{
  python <- Sys.which("python3")
  if (nzchar(python) && python != "/usr/bin/python3")
    use_python(python, required = TRUE)
}