Log metrics, parameters, and MLflow models during training

import mlflow

from mlflow.models import infer_signature

import pandas as pd
from sklearn import datasets
from sklearn.model_selection import train_test_split
from sklearn.linear_model import LogisticRegression
from sklearn.metrics import accuracy_score, precision_score, recall_score, f1_score

# This is the ARN of the MLflow Tracking Server you created
mlflow.set_tracking_uri(your-tracking-server-arn)
mlflow.set_experiment("some-experiment")

# Load the Iris dataset
X, y = datasets.load_iris(return_X_y=True)

# Split the data into training and test sets
X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.2, random_state=42)

# Define the model hyperparameters
params = {"solver": "lbfgs", "max_iter": 1000, "multi_class": "auto", "random_state": 8888}

# Train the model
lr = LogisticRegression(**params)
lr.fit(X_train, y_train)

# Predict on the test set
y_pred = lr.predict(X_test)

# Calculate accuracy as a target loss metric
accuracy = accuracy_score(y_test, y_pred)

# Start an MLflow run and log parameters, metrics, and model artifacts
with mlflow.start_run():
    # Log the hyperparameters
    mlflow.log_params(params)

    # Log the loss metric
    mlflow.log_metric("accuracy", accuracy)

    # Set a tag that we can use to remind ourselves what this run was for
    mlflow.set_tag("Training Info", "Basic LR model for iris data")

    # Infer the model signature
    signature = infer_signature(X_train, lr.predict(X_train))

    # Log the model
    model_info = mlflow.sklearn.log_model(
        sk_model=lr,
        name="iris_model", # Changed from artifact_path to name for MLflow 3.0
        signature=signature,
        input_example=X_train,
        registered_model_name="tracking-quickstart",
    )

import mlflow.sklearn
from mlflow.models import infer_signature
from sklearn.datasets import make_regression
from sklearn.ensemble import RandomForestRegressor

mlflow.set_tracking_uri(arn)
params = {"n_estimators": 3, "random_state": 42}
X, y = make_regression(n_features=4, n_informative=2, random_state=0, shuffle=False)

# Log MLflow entities
with mlflow.start_run() as run:
    rfr = RandomForestRegressor(**params).fit(X, y)
    signature = infer_signature(X, rfr.predict(X))
    mlflow.log_params(params)
    mlflow.sklearn.log_model(rfr, artifact_path="sklearn-model", signature=signature)

model_uri = f"runs:/{run.info.run_id}/sklearn-model"
mv = mlflow.register_model(model_uri, "RandomForestRegressionModel")

print(f"Name: {mv.name}")
print(f"Version: {mv.version}")