If you’re new to Python, one of the first things you’ll encounter is variables and data types. Understanding how Python handles data is essential for writing clean, efficient, and bug-free programs.

We have seen how to read data from a file, either in unstructured text or CSV format, and how to write data in these formats. We’ve also seen how to read and write JSON. In this chapter we’ll see how ...

While we have the Python built-in function sum() which sums the elements of a sequence (provided the elements of the sequence are all of numeric type), it’s instructive to see how we can do this in a ...

Consider the function calculate_area which takes two parameters, length and width, and returns the area of a rectangle. You have a tuple dimensions containing the length and width of a rectangle.

>>> import inquirer >>> test = [('aa', {'a': 1}), ('bb', {'b':2})] >>> inquirer.list_input('Which?', carousel=True, choices=test) [?] Which?: bb aa > bb {'b': 2 ...

IndexError: ‘list index out of range’ is a Python error that occurs when attempting to access a list item outside the range of the list. In Python, list indexes ...