Software Engineering with UML

All You Need to Know, and Nothing You Don't, to Solve Real Problems with Python Python is one of the most popular programming languages in the world, used for everything from shell scripts to web development to data science. As a result, Python is a great language to learn, but you don't need to learn "everything" to get started, just how to use it efficiently to solve real problems. In Learn Enough Python to Be Dangerous , renowned instructor Michael Hartl teaches the specific concepts, skills, and approaches you need to be professionally productive. Even if you've never programmed before, Hartl helps you quickly build technical sophistication and master the lore you need to succeed. Hartl introduces Python both as a general-purpose language and as a specialist tool for web development and data science, presenting focused examples and exercises that help you internalize what matters, without wasting time on details pros don't care about. Soon, it'll be like you were born knowing this stuff—and you'll be suddenly, seriously dangerous. Learn enough about . . . Applying core Python concepts with the interactive interpreter and command line Writing object-oriented code with Python's native objects Developing and publishing self-contained Python packages Using elegant, powerful functional programming techniques, including Python comprehensions Building new objects, and extending them via Test-Driven Development (TDD) Leveraging Python's exceptional shell scripting capabilities Creating and deploying a full web app, using routes, layouts, templates, and forms Getting started with data-science tools for numerical computations, data visualization, data analysis, and machine learning Mastering concrete and informal skills every developer needs Michael Hartl's Learn Enough Series includes books and video courses that focus on the most important parts of each subject, so you don't have to learn everything to get started—you just have to learn enough to be dangerous and solve technical problems yourself. Like this book? Don't miss Michael Hartl's companion video tutorial, Learn Enough Python to Be Dangerous LiveLessons. Register your book for convenient access to downloads, updates, and/or corrections as they become available. See inside book for details. Preface xiii Acknowledgments xvii About the Author xix Chapter 1: Hello, World! 1 1.1 Introduction to Python 6 1.2 Python in a REPL 11 1.3 Python in a File 13 1.4 Python in a Shell Script 16 1.5 Python in a Web Browser 18 Chapter 2: Strings 35 2.1 String Basics 35 2.2 Concatenation and Interpolation 38 2.3 Printing 44 2.4 Length, Booleans, and Control Flow 46 2.5 Methods 56 2.6 String Iteration 62 Chapter 3: Lists 69 3.1 Splitting 69 3.2 List Access 71 3.3 List Slicing 74 3.4 More List Techniques 77 3.5 List Iteration 83 3.6 Tuples and Sets 86 Chapter 4: Other Native Objects 91 4.1 Math 91 4.2 Times and Datetimes 97 4.3 Regular Expressions 103 4.4 Dictionaries 109 4.5 Application: Unique Words 115 Chapter 5: Functions and Iterators 121 5.1 Function Definitions 121 5.2 Functions in a File 130 5.3 Iterators 138 Chapter 6: Functional Programming 149 6.1 List Comprehensions 150 6.2 List Comprehensions with Conditions 156 6.3 Dictionary Comprehensions 159 6.4 Generator and Set Comprehensions 163 6.5 Other Functional Techniques 165 Chapter 7: Objects and Classes 169 7.1 Defining Classes 169 7.2 Custom Iterators 176 7.3 Inheritance 179 7.4 Derived Classes 183 Chapter 8: Testing and Test-Driven Development 191 8.1 Package Setup 192 8.2 Initial Test Coverage 197 8.3 Red 209 8.4 Green 214 8.5 Refactor 220 Chapter 9: Shell Scripts 231 9.1 Reading from Files 231 9.2 Reading from URLs 240 9.3 DOM Manipulation at the Command Line 245 Chapter 10: A Live Web Application 255 10.1 Setup 256 10.2 Site Pages 263 10.3 Layouts 271 10.4 Template Engine 280 10.5 Palindrome Detector 293 10.6 Conclusion 316 Chapter 11: Data Science 319 11.1 Data Science Setup 320 11.2 Numerical Computations with NumPy 327 11.3 Data Visualization with Matplotlib 338 11.4 Introduction to Data Analysis with pandas 353 11.5 pandas Example: Nobel Laureates 361 11.6 pandas Example: Titanic 377 11.7 Machine Learning with scikit-learn 386 11.8 Further Resources and Conclusion 403 Index 405 Python dominates programminglanguages for data science, and it's an ideal first programming language forweb development and many other applications. You should learn Python, but youneedn't learn "everything" about it: just how to use it efficiently to solvereal problems. In Learn Enough Python to be Dangerous, renownedinstructor Michael Hartl teaches the specific concepts, skills, and approachesyou need to do just that. You'll learn enough about: Mastering modern developmentbest practices you'll use throughout your career Working with essential Pythondata types and syntax Getting started with bothobject-oriented and functional programming (including comprehensions) Publishing Python packages Building more reliable codewith testing and Test-Driven Development (TDD) Beginning web developmentwith Flask Solving your first datascience problems And much more Even if you're a completebeginner, Hartl helps you quickly build technical sophistication and master thelore you need to succeed. Focused exercises help you internalize what matters, without wasting time on details pros don't care about. Soon, it'll be like youwere born knowing Python - and you'll be suddenly, seriously dangerous.