Book Image

Hands-On Application Development with PyCharm - Second Edition

By : Bruce M. Van Horn II, Quan Nguyen
5 (1)
Book Image

Hands-On Application Development with PyCharm - Second Edition

5 (1)
By: Bruce M. Van Horn II, Quan Nguyen

Overview of this book

In the quest to develop robust, professional-grade software with Python and meet tight deadlines, it’s crucial to have the best tools at your disposal. In this second edition of Hands-on Application Development with PyCharm, you’ll learn tips and tricks to work at a speed and proficiency previously reserved only for elite developers. To achieve that, you’ll be introduced to PyCharm, the premiere professional integrated development environment for Python programmers among the myriad of IDEs available. Regardless of how Python is utilized, whether for general automation scripting, utility creation, web applications, data analytics, machine learning, or business applications, PyCharm offers tooling that simplifies complex tasks and streamlines common ones. In this book, you'll find everything you need to harness PyCharm's full potential and make the most of Pycharm's productivity shortcuts. The book comprehensively covers topics ranging from installation and customization to web development, database management, and data analysis pipeline development helping you become proficient in Python application development in diverse domains. By the end of this book, you’ll have discovered the remarkable capabilities of PyCharm and how you can achieve a new level of capability and productivity.
Table of Contents (24 chapters)
1
Part 1: The Basics of PyCharm
4
Part 2: Improving Your Productivity
9
Part 3: Web Development in PyCharm
15
Part 4: Data Science with PyCharm
19
Part 5: Plugins and Conclusion

Unit testing in Python using PyCharm

Create a new project in PyCharm using the plain Python project template. Let’s call it bank_account. You’ll find the completed example in the source repository for this chapter, but if you’d like to practice creating and testing the necessary code, just follow along.

PyCharm created a file called main.py. We’ll use it in a moment, but let’s put our bank transaction code in a separate module. One of the tenets of writing good code is writing testable code, and the best way to write testable code is to follow the single-responsibility principle (SRP), where you create units of code that have only one responsibility. SRP is part of a larger set of rules for creating a resilient coding architecture called SOLID, which is an acronym for the following principles:

  • Single-responsibility principle (SRP)
  • Open-closed principle (OCP)
  • Liskov substitution principle (LSP)
  • Interface segregation principle...