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Tshepo Chris Nokeri - Web App Development and Real-Time Web Analytics with Python: Develop and Integrate Machine Learning Algorithms into Web Apps

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Tshepo Chris Nokeri Web App Development and Real-Time Web Analytics with Python: Develop and Integrate Machine Learning Algorithms into Web Apps
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Learn to develop and deploy dashboards as web apps using the Python programming language, and how to integrate algorithms into web apps.

Author Tshepo Chris Nokeri begins by introducing you to the basics of constructing and styling static and interactive charts and tables before exploring the basics of HTML, CSS, and Bootstrap, including an approach to building web pages with HTML. From there, hell show you the key Python web frameworks and techniques for building web apps with them. Youll then see how to style web apps and incorporate themes, including interactive charts and tables to build dashboards, followed by a walkthrough of creating URL routes and securing web apps. Youll then progress to more advanced topics, like building machine learning algorithms and integrating them into a web app. The book concludes with a demonstration of how to deploy web apps in prevalent cloud platforms.

Web App Development and Real-Time Web Analytics with Python is ideal for intermediate data scientists, machine learning engineers, and web developers, who have little or no knowledge about building web apps that implement bootstrap technologies. After completing this book, you will have the knowledge necessary to create added value for your organization, as you will understand how to link front-end and back-end development, including machine learning.

What You Will Learn

  • Create interactive graphs and render static graphs into interactive ones
  • Understand the essentials of HTML, CSS, and Bootstrap
  • Gain insight into the key Python web frameworks, and how to develop web applications using them
  • Develop machine learning algorithms and integrate them into web apps
  • Secure web apps and deploy them to cloud platforms

Who This Book Is For

Intermediate data scientists, machine learning engineers, and web developers.

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Book cover of Web App Development and Real-Time Web Analytics with Python - photo 1
Book cover of Web App Development and Real-Time Web Analytics with Python
Tshepo Chris Nokeri
Web App Development and Real-Time Web Analytics with Python
Develop and Integrate Machine Learning Algorithms into Web Apps
1st ed.
Logo of the publisher Tshepo Chris Nokeri Pretoria South Africa ISBN - photo 2
Logo of the publisher
Tshepo Chris Nokeri
Pretoria, South Africa
ISBN 978-1-4842-7782-9 e-ISBN 978-1-4842-7783-6
https://doi.org/10.1007/978-1-4842-7783-6
Tshepo Chris Nokeri 2022
Apress Standard
The use of general descriptive names, registered names, trademarks, service marks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use.
The publisher, the authors and the editors are safe to assume that the advice and information in this book are believed to be true and accurate at the date of publication. Neither the publisher nor the authors or the editors give a warranty, expressed or implied, with respect to the material contained herein or for any errors or omissions that may have been made. The publisher remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

This Apress imprint is published by the registered company APress Media, LLC part of Springer Nature.

The registered company address is: 1 New York Plaza, New York, NY 10004, U.S.A.

I would like dedicate this book to my family, friends, and anyone who played a pivotal role in any aspect of my life, including the Apress team for the continous support.

Any source code or other supplementary material referenced by the author in this book is available to readers on GitHub via the books product page, located at www.apress.com/9781484277829. For more detailed information, please visit http://www.apress.com/source-code.

Acknowledgments

Writing a single-authored book is demanding, but I received firm support and active encouragement from my family and dear friends. Many heartfelt thanks to the Apress team for their backing throughout the writing and editing process. And my humble thanks to all of you for reading this; I earnestly hope you find it helpful.

Table of Contents
About the Author
Tshepo Chris Nokeri
harnesses advanced analytics and artificial intelligence to foster innovation - photo 3
harnesses advanced analytics and artificial intelligence to foster innovation and optimize business performance. He delivers complex solutions to companies in the mining, petroleum, and manufacturing industries. He received a bachelors degree in information management. He graduated with honours in business science from the University of the Witwatersrand, Johannesburg, on a Tata Prestigious Scholarship and a Wits Postgraduate Merit Award. He was unanimously awarded the Oxford University Press Prize. Tshepo has authored three books: Data Science Revealed (Apress, 2021), Implementing Machine Learning in Finance (Apress, 2021), and Econometrics and Data Science (Apress, 2022).
About the Technical Reviewer
Brij Kishore Pandey
works as a software engineer architect and strategist at ADP He has a wide - photo 4
works as a software engineer, architect, and strategist at ADP. He has a wide interest in software development using cutting-edge tools/technologies in cloud computing, data engineering, data science, artificial intelligence, and machine learning. He has 12 years of experience working with global corporate leaders, including JP Morgan Chase, American Express, 3M Company, Alaska Airlines, Cigna Healthcare, and ADP.
The Author(s), under exclusive license to APress Media, LLC, part of Springer Nature 2022
T. C. Nokeri Web App Development and Real-Time Web Analytics with Python https://doi.org/10.1007/978-1-4842-7783-6_1
1. Tabulating Data and Constructing Static 2D and 3D Charts
Tshepo Chris Nokeri
(1)
Pretoria, South Africa

This chapter introduces the basics of tabulating data and constructing static graphical representations. It begins by demonstrating an approach to extract and tabulate data by implementing the pandas and SQLAlchemy libraries. Subsequently, it reveals two prevalent 2D and 3D charting libraries: Matplotlib and seaborn. It then describes a technique for constructing basic charts (i.e., box-whisker plot, histogram, line plot, scatter plot, density plot, violin plot, regression plot, joint plot, and heatmap).

Tabulating the Data

The most prevalent Python library for tabulating data comprising rows and columns is pandas. Ensure that you install pandas in your environment. To install pandas in a Python environment, use pip install pandas . Likewise, in a conda environment, use conda install -c anaconda pandas .

The book uses Python version 3.7.6 and pandas version 1.2.4. Note that examples in this book also apply to the latest versions.

Listing extracts data from a CSV file by implementing the pandas library.
import pandas as pd
df = pd.read_csv(r"filepath\.csv")
Listing 1-1

Extracting a CSV File Using Pandas

Listing extracts data from an Excel file by implementing pandas.
df = pd.read_excel(r"filepath\.xlsx")
Listing 1-2

Extracting an Excel File Using Pandas

Notice the difference between Listings ).

In a case where there is sequential data and you want to set the datetime as an index, specify the column for parsing, including parse_dates and indexing data using index_col , and then specify the column number (see Listing ).
df = pd.read_csv(r"filepath\.csv", parse_dates=[0], index_col=[0])
Listing 1-3

Sparse and Index pandas DataFrame

Alternatively, you may extract the data from a SQL database.

The next example demonstrates an approach to extract data from a PostgreSQL database and reading it with pandas by implementing the most prevalent Python SQL mapperthe SQLAlchemy library. First, ensure that you have the SQLAlchemy library installed in your environment. To install it in a Python environment, use pip install SQLAlchemy . Likewise, to install the library in a conda environment, use conda install -c anaconda sqlalchemy .

Listing extracts a table from PostgreSQL, assuming the username is "test_user" and the password is "password123" , the port number is "8023" , the hostname is "localhost" , the database name is "dataset" , and the table is "dataset" . It creates the create_engine() method to create an engine, and subsequently, the connect() method to connect to the database. Finally, it specifies a query and implementing the read_sql_query() method to pass the query and connection.
import pandas as pd
import sqlalchemy
from sqlalchemy import create_engine
from sqlalchemy import Table, Column, String, MetaData
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