5 Machine Learning Algorithms Commonly Used in Python

Explore 5 commonly used machine learning algorithms in Python, from linear regression to K-means clustering. Master the tools of data-driven decision-making.

20. Sep 2023
5 Machine Learning Algorithms Commonly Used in Python

Artificial intelligence's subfield of machine learning, which enables computers to learn from data and make predictions or judgements without explicit programming, is revolutionising a number of sectors. Python has emerged as the preferred language for developing machine learning algorithms due to its extensive libraries and frameworks. In this post, we'll examine 5 frequently employed machine learning algorithms in Python and provide details on their uses.

5 Machine Learning Algorithms Commonly Used in Python

1. Linear Regression

One of the simplest and most used machine learning methods is linear regression. When predicting a continuous output variable, also known as the dependent variable, based on one or more input factors, also known as independent variables, this technique is used. The best-fitting linear connection between the input variables and the target variable is discovered using linear regression.


  • Predicting house prices based on features like square footage, number of bedrooms, and location.
  • Forecasting sales based on advertising spending and market demographics.


Python Libraries: scikit-learn, Statsmodels


Linear Regression Example


2. Decision Trees

Decision trees are flexible algorithms used for both regression and classification applications. They operate by building a tree-like representation of choices and probable outcomes. Decision trees are a useful tool for exploring and comprehending data since they are simple to grasp and visualise.


  • Classifying emails as spam or not spam.
  • Predicting whether a passenger will survive on the Titanic based on features like age, gender, and ticket class.


Python Libraries: scikit-learn, XGBoost, LightGBM


Decision Trees Example


3. Random Forest

Multiple decision trees are combined in Random Forest, an ensemble learning approach, to increase accuracy and reduce overfitting. It operates by averaging each tree's predictions or, in classification jobs, by choosing the most well-liked class. Random Forest is renowned for its resilience and capacity for handling huge datasets.


  • Predicting customer churn in a telecom company.
  • Identifying fraudulent credit card transactions.


Python Libraries: scikit-learn, RandomForestClassifier


Random Forest Example


4. K-Means Clustering

K-Means is an unsupervised machine learning technique used to categorise related data points into clusters. It seeks to divide the data into 'k' clusters, each reflecting a collection of related observations.


  • Customer segmentation for targeted marketing.
  • Image compression and color quantization.


Python Libraries: scikit-learn, KMeans


K-Means Clustering Example


5. Naive Bayes

Based on Bayes' theorem, Naive Bayes is a probabilistic classification method. Despite being simple, it excels in text categorization and other tasks. It makes the assumption that characteristics are independent, which is frequently false, yet it can still deliver good outcomes.


  • Spam email detection.
  • Sentiment analysis of social media posts.


Python Libraries: scikit-learn, NLTK


Naive Bayes Example



These five machine learning methods just scratch the surface of Python's enormous machine learning ecosystem. Python's large libraries and user-friendly syntax make it a great choice for implementing machine learning methods, regardless of whether you're working on tasks involving regression, classification, clustering, or natural language processing. As you learn more about machine learning, you'll come across a variety of algorithms and approaches that are designed to tackle distinct issues and difficulties in a range of sectors.


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