tisthemachinelearner: New Workflow with uv for R Integration of scikit-learn

A quick reminder of the previous post:
👉 https://thierrymoudiki.github.io/blog/2025/02/17/python/r/tisthemllearner

tisthemachinelearner is an R (and Python) package that provides a lightweight interface (with approx. 2 classes, hence facilitating benchmarks e.g) to the popular Python machine learning library scikit-learn. The package allows R users to leverage the power of scikit-learn models directly from R, using both S3 and R6 object-oriented programming styles.

Since then, tisthemachinelearner has evolved with a cleaner and more predictable workflow for connecting R to Python scikit-learn, using both S3 and R6 interfaces. It’s now using a dedicated virtual environment manager called uv to handle Python dependencies seamlessly. Faster setup, less hassle!

uv is a lightweight and extremely fast tool to create and manage isolated Python environments. It simplifies the process of setting up the necessary Python environment for R packages that depend on Python libraries. Another advantage here, is that I know exactly what is installed in the environment, making it easier to debug potential issues.

1. Command line

# pip install uv # if necessary
uv venv venv
source venv/bin/activate
uv pip install pip scikit-learn

This creates an isolated Python environment containing the correct dependencies for the R interface to use.

2. Use it from R

install.packages("devtools")
devtools::install_github("Techtonique/tisthemachinelearner_r")

library(tisthemachinelearner)

# Load data
data(mtcars)
head(mtcars)

# Split features and target
X <- as.matrix(mtcars[, -1])  # all columns except mpg
y <- mtcars[, 1]              # mpg column

# Create train/test split
set.seed(42)
train_idx <- sample(nrow(mtcars), size = floor(0.8 * nrow(mtcars)))
X_train <- X[train_idx, ]
X_test  <- X[-train_idx, ]
y_train <- y[train_idx]
y_test  <- y[-train_idx]

# --- R6 interface ---
model <- Regressor$new(model_name = "LinearRegression")
model$fit(X_train, y_train)
preds <- model$predict(X_test)
print(preds)

# --- S3 interface ---
model <- regressor(X_train, y_train, model_name = "LinearRegression")
preds <- predict(model, X_test)
print(preds)