Building an application portfolio for the job market
The goal of this course is the accompanied development of a portfolio of projects. Career changers in particular are usually better able to convince potential companies with a convincing work sample than with their CV alone.
You will learn what employers look for in work samples in the field of data analytics and data science and which focal points are suitable for you. Together with your mentors, you will select suitable data sets and questions. You will then work on projects for your application portfolio, either individually or in small groups.
The training is suitable for you and your career aspirations if you have a degree, ideally in the fields of mathematics, computer science, natural sciences, technology, business administration, (business) information technology or have a comparable qualification or previous experience. You should also have already completed further training as a Data Analyst, BI Analyst or Data Scientist.
Confident use of Data Analytics workflow with Python or SQL and Power BI or confident use of Data Science workflow with Python.
Chapter 1: Data types
In this chapter you will navigate through our programming environment - the Data Lab - for the first time and execute your first code commands. You will learn what data or text represents in Python. Using a set of rules, you will learn how to create, assign and test data in variables. You will then learn how to read out common error messages and practice how to use them productively in your day-to-day work. You will also learn basic Python standard functions, such as type() or str() and use them in application examples. After you‘ve learned about the if statement and can use it to control the flow of your code with conditions, you will finish the chapter with the first part of a two-hour mini-project: You will program a user interface that reacts flexibly to the user‘s input.
Chapter 2: Flow control
In the second chapter you will work on two essential operations to make your code even more flexible: You will learn about lists and for-loops. Lists allow more flexibility in storing data and are a prerequisite for advanced programming. You will learn to create them, read them and change them purposefully. You will use lists to extend the functionality of your user interface from the first chapter and complete the first mini-project. Afterwards you will work with for-loops, which you can use to automatically execute your code several times and level up your programming.
Chapter 3: Functions, modules and methods
In the third chapter, you will round off your programming skills in Python and learn some advanced techniques. These include functions and methods. You learn how to define your own functions to structure your code better. You will also combine the individual programming elements such as conditions, loops and functions in programs. You will use various methods and learn how to import Python modules correctly and how to ensure functionality as a whole. Linked to this you will learn how to import and export data as a simple test. In a one-hour mini-project involving telephone data, you will consolidate what you have learned in the chapter.
Chapter 4: Python applications
In the fourth chapter, you will recap content from chapters 1-3 and round it off with additional material. You‘ll learn what dictionaries are and how they can make your code more efficient. You will get to know complex data structures that you will need for your final project. In a four-hour hands-on project to create a complex user interface for automatically processing customer requests, you will need to bring together everything you learned in the previous chapters.
Chapter 2: OOP basics
In the second chapter you will learn what OOP is, which program principles are based on it, and which conclusions you can draw from it, using simple examples. In the main part of the chapter you explore how classes and attributes are defined and used. You will use examples to examine instance methods and how to use them and define them with method chaining. You‘ll learn what the self keyword is, as well as how to distinguish debugging from class definitions. Finally, you will test your previous knowledge in an interactive intermediate project and repeat the exercises from the chapter.
Chapter 3: Inheritance and composition
In the third chapter, you will learn what inheritance and composition are and how to use these concepts in use cases. In addition to simple inheritance, you will also learn more advanced methods such as inheritance hierarchy and multiple inheritance. In doing so, you‘ll practice deep inheritance methods used in the reusability of data from parent to child classes, compensating for data loss. Finally, we will provide you with the most important best practices for unit tests, so that you can detect errors in your code before your users find them.
Chapter 4: Advanced OOP
In the fourth chapter you will deal with more advanced terms of object-oriented programming, which will accompany you in your daily work. You will study how programs and modules differ and what role __main__ plays. You will learn what decorators are and how to use property decorators optimally. You will look at static and class methods and what special methods and class representations can be used with __str__() and __repr__(). Based on this, you will learn about the options for representation operator overloading offers as well as other important methods from the Python Standard Library and then apply the learned content in a company-relevant interim project.
Chapter 5: OOP applications
In the fifth chapter, you will demonstrate your knowledge in two larger projects that represent classic use cases of object-oriented programming. In the first project, you‘ll build your own interface to a popular data science library that enables further uses for machine learning and data or text analytics. The second project deals with programming your own blockchain, where you will learn more about the underlying concepts. By the end of Module 2, you‘ll be equipped to apply OOP in the corporate world.
The demand for data experts is high. Around 4 million data experts will be needed in Europe by 2025. In Germany alone, 149,000 IT jobs are currently vacant. The demand for data and AI experts in particular continues to grow enormously.
But a decision for a data career is so much more than just a safe decision for the future! As a data expert, you deal with powerful, socially relevant topics, are a tech professional, and are communicative and creative at the same time. The profession is varied, can be combined with most other professions and offers an attractive salary. And most importantly, with us it can be learned unerringly!
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