While IDEs can provide hints for functions, these hints may not be available in environments such as **Jupyter Notebook** or console interpreter. To get information about a function or object, you can use the `help()` function:

def add(a: int, b: int) -> int:
    """This function receives two integer arguments and returns its sum."""
    return a + b


help(add)

Let's consider annotations. Annotations are used in our code to make it more understandable for other developers. It's time to learn how we can help other developers to understand our code.

There are different functions: some for a specific task, some flexible. Here we will learn how to implement different functions with the help of an in-depth study of arguments and their types.

Caught an error? This is normal. There is no programmer who prevented errors in the program. Here we will learn how to handle errors, and we will also learn how to use them for good.

Virtual Environment (venv) is an isolated development environment that helps projects to isolate their interpreter and modules. It's essential for every developer to learn how to use venv, so let's get started.

Mastering Python: Annotations, Errors and Environment