Beginner’s Guide to Machine Learning with Python

Beginner’s Guide to Machine Learning with Python

Learn Machine Learning with Python in simple and easy steps starting from basic to advanced concepts with examples

Learn Machine Learning with Python in simple and easy steps starting from basic to advanced concepts with examples

Machine Learning, a prominent topic in Artificial Intelligence domain, has been in the spotlight for quite some time now. This area may offer an attractive opportunity, and starting a career in it is not as difficult as it may seem at first glance. Even if you have zero-experience in math or programming, it is not a problem. The most important element of your success is purely your own interest and motivation to learn all those things.

If you are a newcomer, you do not know where to start studying and why you need Machine Learning and why it is gaining more and more popularity lately, you got into the right place! I’ve gathered all the needed information and useful resources to help you gain new knowledge and accomplish your first projects.

Why Starting With Python?

If your aim is growing into a successful coder, you need to know a lot of things. But, for Machine Learning & Data Science, it is pretty enough to master at least one coding language and use it confidently. So, calm down, you don’t have to be a programming genius.

For successful Machine Learning journey, it’s necessary to choose the appropriate coding language right from the beginning, as your choice will determine your future. On this step, you must think strategically and arranged correctly the priorities and don’t spend time on unnecessary things.

My opinion — Python is a perfect choice for beginner to make your focus on in order to jump into the field of machine learning and data science.It is a minimalistic and intuitive language with a full-featured library line (also called frameworks) which significantly reduces the time required to get your first results.

Step 0. Brief Overview of ML Process You Need to Know

Machine learning is learning based on experience. As an example, it is like a person who learns to play chess through observation as others play. In this way, computers can be programmed through the provision of information which they are trained, acquiring the ability to identify elements or their characteristics with high probability.

First of all, you need to know that there are various stages of machine learning:

  • data collection
  • data sorting
  • data analysis
  • algorithm development
  • checking algorithm generated
  • the use of an algorithm to further conclusions

To look for patterns, various algorithms are used, which are divided into two groups:

  • data collection
  • data sorting
  • data analysis
  • algorithm development
  • checking algorithm generated
  • the use of an algorithm to further conclusions

With unsupervised learning, your machine receives only a set of input data. Thereafter, the machine is up to determine the relationship between the entered data and any other hypothetical data. Unlike supervised learning, where the machine is provided with some verification data for learning, independent Unsupervised learning implies that the computer itself will find patterns and relationships between different data sets. Unsupervised learning can be further divided into clustering and association.

Supervised learning implies the computer ability to recognize elements based on the provided samples. The computer studies it and develops the ability to recognize new data based on this data. For example, you can train your computer to filter spam messages based on previously received information.

Some Supervised learning algorithms include:

  • data collection
  • data sorting
  • data analysis
  • algorithm development
  • checking algorithm generated
  • the use of an algorithm to further conclusions

Step 1. Brush up Your Math Skills Needed for Python Mathematical Libraries

A person working in the field of AI and ML who doesn’t know math is like a politician who doesn’t know how to persuade. Both have an inescapable area to work upon!
So yes, you can’t deal with ML and Data Science projects without leastwise minor math knowledge basis. However, you don’t need to have a degree in Mathematics to succeed. In my personal experience, devoting at-least 30–45 minutes every day will bear much fruit and you’ll understand and learn advanced Python topics for Maths and Statistics faster.

You need to read or refresh the underlying theory. No need to read a whole tutorial, just focus on key concepts.

Here are 3 steps to learn the mathematics needed for analysis and machine learning:

1 — Linear algebra for data analysis: Scalars, Vectors, Matrices, and Tensors

For example, for the Principal Component Method, you need to know the eigenvectors, and the regression requires matrix multiplication. In addition, machine learning often works with high-dimensional data (data with many variables). This data type is best represented by matrices.

2 — Mathematical Analysis: Derivatives and Gradients

Mathematical analysis underlies many machine learning algorithms. Derivatives and gradients will be needed for optimization problems. For example, one of the most common optimization methods is gradient descent.

For quick learning of Linear Algebra and Math Analysis, I would like to recommend these courses:

Khan Academy provides short practical lessons on linear algebra and math analysis. They cover the most important topics.

MIT OpenCourseWare offers great courses for learning math for ML. All video lectures and study materials are included.

3 — Gradient descent: building a simple Neural Network from scratch

One of the best ways to learn mathematics in the field of analysis and machine learning is to build a simple neural network from scratch. You will use linear algebra to represent a network and mathematical analysis to optimize it. In particular, you will create a gradient descent from scratch. Do not worry too much about the nuances of neural networks. This is fine if you just follow the instructions and write the code.

Step 2. Learn the Basics of Python Syntax

Great news: you do not need a full learning course, as Python and data analysis are not synonymous.

Before starting diving into the syntax, I want to share one insightful advice, which may minimize your possible failures.

Learn to swim by reading books on swimming techniques is impossible, but reading them in parallel with training in the pool results in gaining skills more effectively.

A similar action occurs with the study of programming. It is not worthwhile to focus solely on the syntax. Just like that, you risk losing your interest.

You do not need to memorize everything. Make small steps and do not be afraid to combine theoretical knowledge with practice. Focus on an intuitive understanding, for example, which function is appropriate in a particular case and how conditional operators work. You will gradually memorize the syntax by reading the documentation and in the process of writing code. Soon you no longer have to google such things.

If you don’t have any programming understanding, I recommend reading Automate the Boring Stuff With Python. The book offers to explain practical programming for total beginners and teach from scratch. Read Chapter 6, “String Manipulation,” and complete the practical tasks for this lesson. That will be enough.

Here are some other great resources to explore:

Codecademy — teaches good general syntax

Learn Python the Hard Way — a brilliant manual-like book that explains both basics and more complex applications.

Dataquest— this resource teaches syntax while also teaching data science

**The Python Tutorial **— official documentation

And remember, the sooner you start working on real projects, the sooner you will learn it. Anyway, you can always go back to the syntax if you need it.

Step 3. Discover the Main Data Analysis Libraries

The further stage is to revise and mug up the part of Python that is applicable to data science. And yes, it is time to learn libraries or frameworks. As pointed out before, Python possesses a vast number of libraries. Libraries are purely a collection of ready-made functions and objects that you can import into your script to invest less time.

How to use libraries? Here are my recommendations:

  1. Open Jupyter Notebook (see below).
  2. Go over the library documentation in about half an hour.
  3. Import the library into your Jupyter Notebook.
  4. Follow the step-by-step guide to see the library in action.
  5. Examine the documentation to see what else it is capable of.

I do not recommend immediately diving into learning libraries, because you will probably forget most of what you learned by the time you start using them in projects. Instead, try to find out what each library is capable of.

#Jupyter Notebook

Jupyter Notebook is a lightweight IDE that is a favorite among analysts. In most cases, the installation package for Python already includes Jupyter Notebook. You can open a new project through Anaconda Navigator, which is included in the Anaconda package. Watch this introductory video.

Python libraries you will need:

NumPy

Documentation

Quickstart tutorial

NumPy is shortened from Numerical Python, it is the most universal and versatile library both for pros and beginners. Using this tool you are up to operate with multi-dimensional arrays and matrices with ease and comfort. Such functions like linear algebra operations and numerical conversions are also available.

Pandas

Documentation

Quickstart Tutorial

Pandas is a well-known and high-performance tool for presenting data frames. Using it you can load data from almost any source, calculate various functions and create new parameters, build queries to data using aggregate functions akin to SQL. What is more, there are various matrix transformation functions, a sliding window method and other methods for obtaining information from data. So it’s totally an indispensable thing in the arsenal of a good specialist.

Matplotlib

Documentation

Quickstart Tutorial

Matplotlib is a flexible library for creating graphs and visualization. It is powerful but somewhat heavy-weight. At this point, you can skip Matplotlib and use Seaborn to get started (see Seaborn below).

Scikit-Learn

Documentation

Quickstart Tutorial

I can say it’s the most well-designed ML package I’ve observed so far. It implements a wide-range of machine-learning algorithms and makes it comfortable to plug them into actual applications. You can use a whole slew of functions here like regression, clustering, model selection, preprocessing, classification and more. So, it’s totally worth learning and using. The great advantage here is the high speed of work. So it’s not surprising why such leading platforms like Spotify, Booking.com, J.P.Morgan are using scikit-learn.

Step 4. Develop Structured Projects

Once you master the basic syntax and explore the basics of libraries, you can already begin to make projects yourself. Thanks to the projects, you will be able to learn about new things as well as create a portfolio for further job search.

There are enough resources that offer topics for structured projects.

**Dataquest **— Interactively teaches Python and data science. You are analyzing a series of interesting data sets, starting with the documents of the Central Intelligence Agency and ending with the statistics of the National Basketball Association’s games. You will develop tactical algorithms that include neural networks and decision trees.

Python for Data Analysis — A book written by the author of many papers on the analysis of data on Python.

Scikit — documentation — The main computer training library on Python.

CS109— Courses from Harvard University for Data Science.

Step 5. Work on Your Own Projects

You can find a lot of new things, but it is important to find those projects that will spark a light in you. However, right before this happy moment of finding your dream job, you should learn how to handle errors in your programs excellently. Among the most popular useful resources for this purpose, one can distinguish the following:

StackOverflow — multi-functional site with a bunch of questions and answers where people discuss all possible problems. Plus, it’s the most popular place, so you can ask about your errors and get the answer from a huge audience

Python Documentation — one more good place to search for reference material

It goes without saying, you also should not neglect any opportunity or collaboration you are requested. Participate in all possible events related to Python and find people who work on interesting projects. Explore new projects that have been made by other people, by the way, Github is an excellent place for this aim. Learn about new and stay tuned in a theme — all this will definitely contribute for level up your game!

Final Word and a Bit of Motivation

You may probably ask ‘why should I plunge into machine learning realm; probably, there are already lots of other good specialists.’

Know what? I had also been fallen into this trap and now can boldly say — such thinking will not bring you anything good. It’s an immense barrier to your success.

A person working in the field of AI and ML who doesn’t know math is like a politician who doesn’t know how to persuade. Both have an inescapable area to work upon!
Who knows what awaits us in the future. Perhaps these numbers will increase even more and machine learning will become more important? And most likely, yes!

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Machine Learning, Data Science and Deep Learning with Python

Machine Learning, Data Science and Deep Learning with Python

Complete hands-on Machine Learning tutorial with Data Science, Tensorflow, Artificial Intelligence, and Neural Networks. Introducing Tensorflow, Using Tensorflow, Introducing Keras, Using Keras, Convolutional Neural Networks (CNNs), Recurrent Neural Networks (RNNs), Learning Deep Learning, Machine Learning with Neural Networks, Deep Learning Tutorial with Python

Machine Learning, Data Science and Deep Learning with Python

Complete hands-on Machine Learning tutorial with Data Science, Tensorflow, Artificial Intelligence, and Neural Networks

Explore the full course on Udemy (special discount included in the link): http://learnstartup.net/p/BkS5nEmZg

In less than 3 hours, you can understand the theory behind modern artificial intelligence, and apply it with several hands-on examples. This is machine learning on steroids! Find out why everyone’s so excited about it and how it really works – and what modern AI can and cannot really do.

In this course, we will cover:
• Deep Learning Pre-requistes (gradient descent, autodiff, softmax)
• The History of Artificial Neural Networks
• Deep Learning in the Tensorflow Playground
• Deep Learning Details
• Introducing Tensorflow
• Using Tensorflow
• Introducing Keras
• Using Keras to Predict Political Parties
• Convolutional Neural Networks (CNNs)
• Using CNNs for Handwriting Recognition
• Recurrent Neural Networks (RNNs)
• Using a RNN for Sentiment Analysis
• The Ethics of Deep Learning
• Learning More about Deep Learning

At the end, you will have a final challenge to create your own deep learning / machine learning system to predict whether real mammogram results are benign or malignant, using your own artificial neural network you have learned to code from scratch with Python.

Separate the reality of modern AI from the hype – by learning about deep learning, well, deeply. You will need some familiarity with Python and linear algebra to follow along, but if you have that experience, you will find that neural networks are not as complicated as they sound. And how they actually work is quite elegant!

This is hands-on tutorial with real code you can download, study, and run yourself.

Best Python Libraries For Data Science & Machine Learning

Best Python Libraries For Data Science & Machine Learning

Best Python Libraries For Data Science & Machine Learning | Data Science Python Libraries

This video will focus on the top Python libraries that you should know to master Data Science and Machine Learning. Here’s a list of topics that are covered in this session:

  • Introduction To Data Science And Machine Learning
  • Why Use Python For Data Science And Machine Learning?
  • Python Libraries for Data Science And Machine Learning
  • Python libraries for Statistics
  • Python libraries for Visualization
  • Python libraries for Machine Learning
  • Python libraries for Deep Learning
  • Python libraries for Natural Language Processing

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Further reading about Python

Complete Python Bootcamp: Go from zero to hero in Python 3

Machine Learning A-Z™: Hands-On Python & R In Data Science

Python and Django Full Stack Web Developer Bootcamp

Complete Python Masterclass

Python Tutorial - Python GUI Programming - Python GUI Examples (Tkinter Tutorial)

Computer Vision Using OpenCV

OpenCV Python Tutorial - Computer Vision With OpenCV In Python

Python Tutorial: Image processing with Python (Using OpenCV)

A guide to Face Detection in Python

Machine Learning Tutorial - Image Processing using Python, OpenCV, Keras and TensorFlow

PyTorch Tutorial for Beginners

The Pandas Library for Python

Introduction To Data Analytics With Pandas


Python Programming for Data Science and Machine Learning

Python Programming for Data Science and Machine Learning

This article provides an overview of Python and its application to Data Science and Machine Learning and why it is important.

Originally published by Chris Kambala  at dzone.com

Python is a general-purpose, high-level, object-oriented, and easy to learn programming language. It was created by Guido van Rossum who is known as the godfather of Python.

Python is a popular programming language because of its simplicity, ease of use, open source licensing, and accessibility — the foundation of its renowned community, which provides great support and help in creating tons of packages, tutorials, and sample programs.

Python can be used to develop a wide variety of applications — ranging from Web, Desktop GUI based programs/applications to science and mathematics programs, and Machine learning and other big data computing systems.

Let’s explore the use of Python in Machine Learning, Data Science, and Data Engineering.

Machine Learning

Machine learning is a relatively new and evolving system development paradigm that has quickly become a mandatory requirement for companies and programmers to understand and use. See our previous article on Machine Learning for the background. Due to the complex, scientific computing nature of machine learning applications, Python is considered the most suitable programming language. This is because of its extensive and mature collection of mathematics and statistics libraries, extensibility, ease of use and wide adoption within the scientific community. As a result, Python has become the recommended programming language for machine learning systems development.

Data Science

Data science combines cutting edge computer and storage technologies with data representation and transformation algorithms and scientific methodology to develop solutions for a variety of complex data analysis problems encompassing raw and structured data in any format. A Data Scientist possesses knowledge of solutions to various classes of data-oriented problems and expertise in applying the necessary algorithms, statistics, and mathematic models, to create the required solutions. Python is recognized among the most effective and popular tools for solving data science related problems.

Data Engineering

Data Engineers build the foundations for Data Science and Machine Learning systems and solutions. Data Engineers are technology experts who start with the requirements identified by the data scientist. These requirements drive the development of data platforms that leverage complex data extraction, loading, and transformation to deliver structured datasets that allow the Data Scientist to focus on solving the business problem. Again, Python is an essential tool in the Data Engineer’s toolbox — one that is used every day to architect and operate the big data infrastructure that is leveraged by the data scientist.

Use Cases for Python, Data Science, and Machine Learning

Here are some example Data Science and Machine Learning applications that leverage Python.

  • Netflix uses data science to understand user viewing pattern and behavioral drivers. This, in turn, helps Netflix to understand user likes/dislikes and predict and suggest relevant items to view.
  • Amazon, Walmart, and Target are heavily using data science, data mining and machine learning to understand users preference and shopping behavior. This assists in both predicting demands to drive inventory management and to suggest relevant products to online users or via email marketing.
  • Spotify uses data science and machine learning to make music recommendations to its users.
  • Spam programs are making use of data science and machine learning algorithm(s) to detect and prevent spam emails.

This article provided an overview of Python and its application to Data Science and Machine Learning and why it is important.

Originally published by Chris Kambala  at dzone.com

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