Introduction to Scikit-learn Pipelines

How to simplify the preprocessing operations

In a typical machine learning task, the features are not likely to be in the most appealing format for a model. Thus, we usually need to proprocess the features before training.

The common preprocessing operations are handling missing values, scaling the numerical features, and encoding the categorical features. The preprocessing operations can be viewed as transforming the features in some sense.

The pipeline module of Scikit-learn is a tool that makes the preprocessing simple and easy by combining the transformations in a pipe. It is important to note that the intermediate steps in a pipeline must transform a feature. Thus, they need to be able to implement the fit and transform methods.

In this article, we will be creating a pipeline to transform features for a machine learning model.

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#artificial-intelligence #machine-learning #python #data-science #scikit-learn

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Scikit-Learn Is Still Rocking, Been Introduced To French President

Amilestone for open source projects — French President Emmanuel Macron has recently been introduced to Scikit-learn. In fact, in a recent tweet, Scikit-learn creator and Inria tenured research director, Gael Varoquaux announced the presentation of Scikit-Learn, with applications of machine learning in digital health, to the president of France.

He stated the advancement of this free software machine learning library — “started from the grassroots, built by a community, we are powering digital revolutions, adding transparency and independence.”

#news #application of scikit learn for machine learning #applications of scikit learn for digital health #scikit learn #scikit learn introduced to french president

Top Free Resources To Learn Scikit-Learn

Scikit-Learn is one of the popular software machine learning libraries. The library is built on top of NumPy, SciPy, and Matplotlib and supports supervised and unsupervised learning as well as provides various tools for model fitting, data preprocessing, model selection and evaluation.

Scikit-Learn Tutorials

About: From the developers of Scikit-Learn, this tutorial provides an introduction to machine learning with Scikit-Learn. It includes topics such as problem setting, loading an example dataset, learning and predicting. The tutorial is suitable for both beginners and advanced students.

Perform Sentiment Analysis with Scikit-Learn

**About: **In this project-based course, you will learn the fundamentals of sentiment analysis, and build a logistic regression model to classify movie reviews as either positive or negative. You will learn how to develop and employ a logistic regression classifier using Scikit-Learn, perform feature extraction with The Natural Language Toolkit (NLTK), tune model hyperparameters and evaluate model accuracy etc.

Python Machine Learning: Scikit-Learn Tutorial

**About: **Python Machine Learning: Scikit-Learn tutorial will help you learn the basics of Python machine learning. You will learn how to use Python and its libraries to explore your data with the help of Matplotlib and Principal Component Analysis (PCA). You will also learn how to work with the KMeans algorithm to construct an unsupervised model, fit this model to your data, predict values, and validate the model.

Scikit Learn Tutorial | Machine Learning with Python

**About: **Edureka’s video tutorial introduces machine learning in Python. It will take you through regression and clustering techniques along with a demo of SVM classification on the famous iris dataset. This video helps you to learn the introduction to Scikit-learn and how to install it, understand how machine learning works, among other things.

Regression using Scikit-Learn

About: In this Coursera offering, you will learn about Linear Regression, Regression using Random Forest Algorithm, Regression using Support Vector Machine Algorithm. Scikit-Learn provides a comprehensive array of tools for building regression models.

Machine Learning with Scikit-Learn Tutorial

About: In this course, you will learn about machine learning, algorithms, and how Scikit-Learn makes it all so easy. You will get to know the machine learning approach, jargons to understand a dataset, features of supervised and unsupervised learning models, algorithms such as regression, classification, clustering, and dimensionality reduction.

Predict Sales Revenue with Scikit-Learn

About: In this two-hour long project-based course, you will build and evaluate a simple linear regression model using Python. You will employ the Scikit-Learn module for calculating the linear regression while using pandas for data management and seaborn for plotting. By the end of this course, you will be able to build a simple linear regression model in Python with Scikit-Learn, employ Exploratory Data Analysis (EDA) to small data sets with seaborn and pandas.

SciPy 2016 Scikit-learn Tutorial

**About: **This tutorial is available on GitHub. It includes an introduction to machine learning with sample applications, data formats, preparation and representation, supervised learning: training and test data, the Scikit-Learn estimator interface and more.

Build NLP pipelines using Scikit-Learn

About: This is a two-hour long project-based course, where you will understand the business problem and the dataset and learn how to generate a hypothesis to create new features based on existing data. You will learn to perform text pre-processing and create custom transformers to generate new features. You will also learn to implement an NLP pipeline, create custom transformers and build a text classification model.

#developers corner #learn scikit-learn #machine learning library #scikit learn

Machine Learning Pipelines With Scikit-Learn

This post will serve as a step by step guide to build pipelines that streamline the machine learning workflow. I will be using the infamous Titanic dataset for this tutorial. The dataset was obtained from Kaggle. The goal being to predict whether a given person survived or not. I will be implementing various classification algorithms, as well as, grid searching and cross validation. This dataset holds records for each passenger consisting of 10 variables (see data dictionary below). For the purposes of this tutorial, I will only be using the train dataset, which will be split into train, validation, and test sets.

(Image by author)

Why Pipelines?

The machine learning workflow consists of many steps from data preparation (e.g., dealing with missing values, scaling/encoding, feature extraction). When first learning this workflow, we perform the data preparation one step at a time. This can become time consuming since we need to perform the preparation steps to both the training and testing data. Pipelines allow us to streamline this process by compiling the preparation steps while easing the task of model tuning and monitoring. Scikit-Learn’s Pipeline class provides a structure for applying a series of data transformations followed by an estimator (Mayo, 2017). For a more detailed overview, take a look over the documentation. There are many benefits when implementing a Pipeline:

#machine-learning-pipeline #crossvalidation #gridsearchcv #machine-learning #pipeline

Machine Learning Model Development and Deployment with MLflow and Scikit-learn Pipelines

The Victorian Gasolier is an example of an industrial gas pipeline terminating in an elegant fixture. Similarly, our machine learning pipeline needs to be functional, compatible with other systems, and attractive for both developers and users. This post contains an example of python machine learning model development using Scikit-learn pipelines and deployment with MLflow. The steps include:

• Utilizing Scikit-learn pipeline with custom transformers
• Output of model and custom transformer code to MLflow tracking server
• Executing using ML Project to link model code to results
• Serving of model from the MLflow tracking server via a REST-API

#deployment #scikit-learn #mlflow #machine-learning-python #pipeline

Are you using Pipeline in Scikit-Learn?

If you are doing Machine Learning, you would have come across pipelines as they help you to make a better machine learning workflow which is easy to understand and reproducible.

I recently discovered that you can combine Pipeline with GridSearchCV to not only find best hyperparameters for your model but can also find the best transformers for your machine learning tasks like-

1. Scaler to scale your data.
2. Impute strategy to fill missing values.
3. The number of components in PCA you should use.

and many others. Let’s see how it can be done.

Dataset details

To best demonstrate, I am going to use the Titanic dataset from OpenML here to walkthrough on how you can create a data pipeline.

You can download the dataset using the following commands-

from sklearn.datasets import fetch_openml

# Dataset details at- https://www.openml.org/d/40945
X, y = fetch_openml("titanic", version=1, as_frame=True, return_X_y=True)

Also, have a look at my notebook which have more details about each operation, feel free to download and import it in your environment and play around-

#pipeline #machine-learning #data-science #scikit-learn #python