Interface to Python Virtual Environments

R functions for managing Python virtual environments.

virtualenv_create(
  envname = NULL,
  python = NULL,
  ...,
  version = NULL,
  packages = "numpy",
  module = getOption("reticulate.virtualenv.module"),
  system_site_packages = getOption("reticulate.virtualenv.system_site_packages",
    default = FALSE),
  pip_version = getOption("reticulate.virtualenv.pip_version", default = NULL),
  setuptools_version = getOption("reticulate.virtualenv.setuptools_version", default =
    NULL),
  extra = getOption("reticulat.evirtualenv.extra", default = NULL)
)

virtualenv_install(
  envname = NULL,
  packages,
  ignore_installed = FALSE,
  pip_options = character(),
  ...
)

virtualenv_remove(envname = NULL, packages = NULL, confirm = interactive())

virtualenv_list()

virtualenv_root()

virtualenv_python(envname = NULL)

virtualenv_exists(envname = NULL)

Arguments

envname	The name of, or path to, a Python virtual environment. If this name contains any slashes, the name will be interpreted as a path; if the name does not contain slashes, it will be treated as a virtual environment within virtualenv_root(). When NULL, the virtual environment as specified by the RETICULATE_PYTHON_ENV environment variable will be used instead. To refer to a virtual environment in the current working directory, you can prefix the path with ./<name>.
python	The path to a Python interpreter, to be used with the created virtual environment. When NULL, the Python interpreter associated with the current session will be used.
...	Optional arguments; currently ignored and reserved for future expansion.
version	The version of Python to be used with the newly-created virtual environment. Python installations as installed via install_python() will be used.
packages	A set of Python packages to install (via pip install) into the virtual environment, after it has been created. By default, the "numpy" package will be installed, and the pip, setuptools and wheel packages will be updated. Set this to FALSE to avoid installing any packages after the virtual environment has been created.
module	The Python module to be used when creating the virtual environment -- typically, virtualenv or venv. When NULL (the default), venv will be used if available with Python >= 3.6; otherwise, the virtualenv module will be used.
system_site_packages	Boolean; create new virtual environments with the --system-site-packages flag, thereby allowing those virtual environments to access the system's site packages? Defaults to FALSE.
pip_version	The version of pip to be installed in the virtual environment. Relevant only when module == "virtualenv". Set this to FALSE to disable installation of pip altogether.
setuptools_version	The version of setuptools to be installed in the virtual environment. Relevant only when module == "virtualenv". Set this to FALSE to disable installation of setuptools altogether.
extra	An optional set of extra command line arguments to be passed. Arguments should be quoted via shQuote() when necessary.
ignore_installed	Boolean; ignore previously-installed versions of the requested packages? (This should normally be TRUE, so that pre-installed packages available in the site libraries are ignored and hence packages are installed into the virtual environment.)
pip_options	An optional character vector of additional command line arguments to be passed to pip.
confirm	Boolean; confirm before removing packages or virtual environments?

Details

Virtual environments are by default located at ~/.virtualenvs (accessed with the virtualenv_root function). You can change the default location by defining defining the WORKON_HOME environment variable.