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Setting the Scene

Overview

Teaching: 15 min
Exercises: 0 min
Questions
  • What are we teaching in this course?

  • Why did we pick specific topics to cover?

Objectives
  • Setting the scene and expectations

  • Making sure everyone has all the necessary software installed

Introduction

So, you have gained basic software development skills either by self-learning or attending, e.g., a novice Software Carpentry course. You have been applying those skills for a while by writing code to help with your work and you feel comfortable developing code and troubleshooting problems. However, your software has now reached a point where there’s too much code to be kept in one script. Perhaps it’s involving more researchers (developers) and users, and more collaborative development effort is needed to add new functionality while ensuring previous development efforts remain functional and maintainable.

This course provides the next step in software development - it teaches some intermediate software engineering skills and best practices to help you restructure existing and design more robust, reusable and maintainable code, automate the process of testing and verifying software correctness and support collaborations with others in a way that mimics a typical software development process within a team.

The course uses a number of different software development tools and techniques interchangeably as you would in a real life. We had to make some choices about topics and tools to teach here - based on ease of installation for the audience, length of the course and other considerations. Tools used here are not mandated though - alternatives exist and we point some of them out along the way. Over time, you will develop a preference for certain tools and programming languages based on your personal taste or based on what is commonly used by your group, collaborators or community. However, the topics covered should give you a solid foundation for working on software development in a team and producing high quality software that is easier to develop and and sustain in the future by yourself and others. Skills and tools taught here, while Python-specific, are transferable to other similar tools and programming languages.

The course is organised into the following sections:

Course overview diagram

Section 1: Setting up Software Environment

In the first section we are going to set up our working environment and familiarise ourselves with various tools and techniques for software development in a typical collaborative code development cycle:

Section 2: Verifying Software Correctness at Scale

Once we know our way around different code development tools, techniques and conventions, in this section we learn:

Section 3: Software Development as a Process

In this section, we step away from writing code for a bit to look at software from a higher level as a process of development and its components:

Section 4: Collaborative Software Development for Reuse

Advancing from the solo code development, in this section you will start working with your fellow learners on a group project (as you would do when collaborating on a software project in a team), and learn:

Section 5: Managing and Improving Software Over Its Lifetime

Finally, we move beyond just software development to managing a collaborative software project and will look into:

Before We Start

A few notes before we start.

Prerequisite Knowledge

This is an intermediate-level software development course intended for people who have already been developing code in Python (or other languages) and applying it to their own problems after gaining basic software development skills. So, it is expected for you to have some prerequisite knowledge on the topics covered, as outlined at the beginning of the lesson. Check out this quiz to help you test your prior knowledge and determine if this course is for you.

Required Software

Please make sure that you have all the necessary software installed as described in the Setup section. This section also contains instructions on how to test your setup.

Compulsory and Optional Exercises

Exercises are a crucial part of this course and the narrative. They are used to reinforce the points taught and give you an opportunity to practice things on your own. Please do not be tempted to skip exercises as that will get your local software project out of sync with the course and break the narrative. Exercises that are clearly marked as “optional” can be skipped without breaking things but we advise you to go through them too, if time allows. All exercises contain solutions but, wherever possible, try and work out a solution on your own.

Outdated Screenshots

Throughout this lesson we will make use and show content from Graphical User Interface (GUI) tools (PyCharm and GitHub). These are evolving tools and platforms, always adding new features and new visual elements. Screenshots in the lesson may then become out-of-sync, refer to or show content that no longer exists or is different to what you see on your machine. If during the lesson you find screenshots that no longer match what you see or have a big discrepancy with what you see, please open an issue describing what you see and how it differs from the lesson content. Feel free to add as many screenshots as necessary to clarify the issue.

Key Points

  • This lesson focuses on core, intermediate skills covering the whole software development life-cycle that will be of most use to anyone working collaboratively on code.

  • For code development in teams - you need more than just the right tools and languages. You need a strategy (best practices) for how you’ll use these tools as a team.

  • The lesson follows on from the novice Software Carpentry lesson, but this is not a prerequisite for attending as long as you have some basic Python, command line and Git skills and you have been using them for a while to write code to help with your work.