R and the arrow R library are automatically installed when installing ryp via conda or mamba, but not via pip. ryp uses the R installation pointed to

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2024-10-01 18:30:08

R and the arrow R library are automatically installed when installing ryp via conda or mamba, but not via pip. ryp uses the R installation pointed to by the environment variable R_HOME, or if R_HOME is not defined or not a directory, by running R RHOME through subprocess.run().

r(R_code) runs a string of R code inside ryp's R interpreter, which is embedded inside Python. It can contain multiple statements separated by semicolons or newlines (e.g. within a triple-quoted Python string). It returns None; use to_py() instead if you would like to convert the result back to Python.

r() with no arguments opens up an R terminal inside your Python terminal for interactive debugging. Press Ctrl + D to exit back to the Python terminal. R variables defined from Python will be available in the R terminal, and variables defined in the R terminal will be available from Python once you exit:

Note that the default value for R_code is the special sentinel value ... (Ellipsis) rather than None. This stops users from inadvertently opening the terminal when passing a variable that is supposed to be a string but is unexpectedly None.